scholarly journals Untangling the Indonesian tangle net fishery: describing a data-poor fishery targeting large threatened rays (Order Batoidea)

2019 ◽  
Author(s):  
Brooke M. D’Alberto ◽  
William T. White ◽  
Andrew Chin ◽  
Dharmadi ◽  
Colin A. Simpfendorfer
Keyword(s):  
Seasonal Variation ◽  
Target Species ◽  
Size Classes ◽  
Catch Data ◽  
Long Line ◽  
Main Target ◽  
The Status ◽  
Incidental Catch ◽  
Catch Composition ◽  
Over Time

AbstractShark-like batoids (Order Rhinopristiformes) are normally taken as incidental catch in fisheries targeting other species, one exception is a poorly understood Indonesian tangle net fishery. Market surveys of Muara Angke landing port recorded landed catch for this fishery. Recent catch data from Indonesian Capture Fisheries (2017 – 2018) were also examined to provide contemporary information. During the market surveys, 1,559 elasmobranchs were recorded, comprised of 24 species of batoids and nine species of sharks. The most abundant were pink whiprayPateobatis faiand bottlenose wedgefishRhynchobatus australiae, the latter being the main target species. Catch composition differed between individual tangle net boat landings, likely reflecting different fishing grounds, seasonal variation and potential localised declines in species over time. The fishery is highly selective for larger size classes, but smaller size classes of target species are also caught in high numbers in other Indonesian fisheries such as trawl, small mesh gillnet, and hand- and long-line fisheries. As of July 2018, the tangle net fishery was still operating, but few wedgefish were caught and the main landed catch was stingrays. Evidence of substantial and rapid declines in landings of wedgefish species, raises concerns about the status of shark-like batoids and stingrays in Indonesia.

scholarly journals Catch composition and management of daytime purse seine fishery on the Southern Mediterranean Sea Coast, Abu Qir Bay, Egypt

2001 ◽  
Vol 2 (2) ◽  
pp. 119 ◽  
Author(s):  
A. EL-HAWEET
Keyword(s):  
Purse Seine ◽  
Target Species ◽  
Catch Per Unit Effort ◽  
Main Target ◽  
Length Range ◽  
Target Fish ◽  
Southern Mediterranean ◽  
By Catch ◽  
Abu Qir Bay ◽  
Catch Composition

The present work aimed to obtain precise data on the catch of the purse seine net operating at daytime from sunrise till noon in Abu Qir Bay during 1997 and 1998. Sardine, anchovy, mullet and rabbitfish were recorded as the main target fish groups. Twenty-seven species were recorded as by-catch species. Catch per unit effort was estimated to be 93 kg/day/boat. The percentage of each target species in the catch and its length frequency distribution were presented. The length range of by-catch species and the season of catch were recorded. Daytime purse seine in Abu Qir Bay is an effective method but should regulated by directing the fishing to deeper waters outside the bay rather than the inshore coastal area to conserve many economic species of this important fishery.

scholarly journals Catch Composition of Set Net Fisheries during Normal Season in Sungai Sembilang Waters, Selangor, Malaysia

2021 ◽  
Vol 13 (2) ◽  
pp. 271
Author(s):  
Wan Muhammad Luqman bin Wan Rosdi ◽  
Abdul Wahab Abdullah ◽  
Mohd Nazir Taib ◽  
Noor Hanis Abu Halim ◽  
Nur Habibah Abu Talib ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Species Abundance ◽  
Peninsular Malaysia ◽  
Total Catch ◽  
Research Assistant ◽  
Catch Data ◽  
The Status ◽  
Catch Composition ◽  
Traditional Fishing ◽  
Local Fisherman

Highlight ResearchThe Set Net was identified and recorded.Length and weight of the catch of set net was analyzed. AbstractSet net fisheries are made according to traditional fishing gears method in the coastal waters of Sungai Sembilang, Selangor, Peninsular Malaysia. These fisheries system are the passive structure of gear used to catch fish that swim in shallow water with muddy substrate. This study focused on determining the species variety and the possible future of set net fisheries in Sungai Sembilang. Catch composition of set net was investigated based on the catch data during July to December 2020 and continued from January to February 2021. The catch data was recorded by a research assistant on site during fishing season. The data consist of species, length and weight of all catches recorded. Total catch of 60 fish species belonging to 23 families were captured during this study period. Ariidae (31.73%), Clupeidae (11.56%), and Scatophagidae (7.96%) were determined as dominant families caught this set net. The total dominant catch amount of species Plicofollis argyropleuron (18.71%), Nemapteryx caelata (9.96%), and Anodontostoma chacunda (8.92%) compromised 37.6% of the total catch. This type of fishing gear can be used by local fisherman to catch fishes and can prevent trawl net from come closer to the shore. This study would provide some general useful information about the status of set net fisheries as well as the species abundance caught from the set net. 

In or Out?

2018 ◽  
Author(s):  
Catherine E. De Vries
Keyword(s):  
Public Opinion ◽  
Status Quo ◽  
Data Sources ◽  
Fine Grained ◽  
Alternative State ◽  
Empirical Measurement ◽  
The Status ◽  
People’S Attitudes ◽  
Over Time ◽  
The Eu

This chapter introduces a benchmark theory of public opinion towards European integration. Rather than relying on generic labels like support or scepticism, the chapter suggests that public opinion towards the EU is both multidimensional and multilevel in nature. People’s attitudes towards Europe are essentially based on a comparison between the benefits of the status quo of membership and those associated with an alternative state, namely one’s country being outside the EU. This comparison is coined the ‘EU differential’. When comparing these benefits, people rely on both their evaluations of the outcomes (policy evaluations) and the system that produces them (regime evaluations). This chapter presents a fine-grained conceptualization of what it means to be an EU supporter or Eurosceptic; it also designs a careful empirical measurement strategy to capture variation, both cross-nationally and over time. The chapter cross-validates these measures against a variety of existing and newly developed data sources.

scholarly journals Personality dynamics at work: The effects of form, time, and context of variability

2021 ◽  
pp. 089020702110173
Author(s):  
Nadin Beckmann ◽  
Damian P Birney ◽  
Amirali Minbashian ◽  
Jens F Beckmann
Keyword(s):  
Individual Differences ◽  
Cognitive Ability ◽  
Temporal Stability ◽  
Limited Evidence ◽  
Short Term ◽  
State Data ◽  
The Status ◽  
Over Time ◽  
Trait Variability

The study aimed to investigate the status of within-person state variability in neuroticism and conscientiousness as individual differences constructs by exploring their (a) temporal stability, (b) cross-context consistency, (c) empirical links to selected antecedents, and (d) empirical links to longer term trait variability. Employing a sample of professionals ( N = 346) from Australian organisations, personality state data together with situation appraisals were collected using experience sampling methodology in field and repeatedly in lab-like settings. Data on personality traits, cognitive ability, and motivational mindsets were collected at baseline and after two years. Contingent (situation contingencies) and non-contingent (relative SD) state variability indices were relatively stable over time and across contexts. Only a small number of predictive effects of state variability were observed, and these differed across contexts. Cognitive ability appeared to be associated with state variability under lab-like conditions. There was limited evidence of links between short-term state and long-term trait variability, except for a small effect for neuroticism. Some evidence of positive manifold was found for non-contingent variability. Systematic efforts are required to further elucidate the complex pattern of results regarding the antecedents, correlates and outcomes of individual differences in state variability.

Fish and invertebrate by-catch in the crab pot fishery in the Isle of Man, Irish Sea

2017 ◽  
Vol 98 (8) ◽  
pp. 2099-2111
Author(s):  
Fikret Öndes ◽  
Michel J. Kaiser ◽  
Lee G. Murray
Keyword(s):  
Irish Sea ◽  
Target Species ◽  
Catch Per Unit Effort ◽  
Isle Of Man ◽  
Ecosystem Effects ◽  
By Catch ◽  
Catch Rates ◽  
Taxonomic Groups ◽  
Catch Composition ◽  
Autumn And Winter

Baited trap or pot fisheries are considered to have relatively few wider ecosystem effects on the marine environment, particularly when compared with towed mobile fishing gear. However, this assumption is rarely tested in the field. This study aimed to determine the composition of non-target species that occur in crustacean pots and to assess spatial and temporal differences in catches in the waters around the Isle of Man, Irish Sea. The data were collected using fishery independent surveys and a questionnaire study. Based on fishery independent surveys, a total of five taxonomic groups and 43 species occurred as by-catch. The dominant by-catch species was velvet crab Necora puber. The by-catch per unit effort (BPUE) for all of the non-target species was low particularly in comparison to towed bottom gear fisheries around the Isle of Man. BPUE of species composition varied considerably between different locations around the Isle of Man. The results of both the fishery independent and questionnaire data suggested that the by-catch rates varied with season with peak BPUE occurring in spring which then declined into autumn and winter. By-catch composition did not decrease significantly with an increasing target species catch. Overall, by-catch was low relative to target species catch which may be partially attributable to the use of escape panels in pot fisheries in the Isle of Man.

The Genesis and Development of the Maqāṣid al-Qur’ān

2013 ◽  
Vol 30 (3) ◽  
pp. 39-58
Author(s):  
Tazu Islam
Keyword(s):  
Compact Form ◽  
Television Programs ◽  
The Public ◽  
The Status ◽  
The Subject ◽  
Scholarly Discussion ◽  
Over Time ◽  
Academic Debate

Maqāṣid al-Qur’ān is an emerging science that promotes an understanding of the Qur’anic discourse’s purposive (maqasidic) angle. Beginning with preliminary ideas in the fifth Islamic century, it has now achieved the status, in the eyes of many prominent contemporary Muslims, of being a specific science. Having been the subject of scholarly discussion in articles, books, television programs, seminars and conferences, this subject has created a new academic debate in the very contemporary field of Qur’anic studies. This study explores its genesis and conceptual developments over time by analyzing the root of this science as well as how it has fared at the hands of early and modern scholarship of the Qur’an. Its findings are expected to contribute to presenting this field to the public in a compact form.

Open Houses from Etic to Emic Perspectives: Casa Aperta in Early-Modern and Nineteenth-Century Italy

2021 ◽  
Vol 51 (4) ◽  
pp. 440-463
Author(s):  
Raffaella Sarti
Keyword(s):  
Nineteenth Century ◽  
Early Modern ◽  
Local People ◽  
Geographical Differences ◽  
Citizenship Rights ◽  
The Status ◽  
Changes Over Time ◽  
Over Time

What did early-modern and nineteenth-century Italians mean when they used the expressions tener casa aperta or aver casa aperta, literally to keep open house and to have an open house? In this article I will try to answer this question, which is far less trivial than one might imagine. Before tackling the topic, a premise is necessary. In some previous works, I used an etic category of ‘open houses’, i.e. a category I elaborated to interpret the implications of the presence, in many households, of domestic staff from different classes, places, races than their masters/employers. Such a presence made those houses open. The border between different peoples and cultures was inside the houses themselves that were places of exchanges, confrontations and clashes. In this article, I will develop a different approach: I will map the emic uses of the ‘open-house’ category, i.e. I will analyse how early-modern and nineteenth-century Italians used the expressions tener casa aperta or aver casa aperta. While some uses had to do with hospitality and sociability, others had legal meanings, referring to citizenship rights and privileges, the status of aristocrats, the differences between foreigners and local people and taxpaying. I will pay particular attention to the latter, also suggesting possible geographical differences and changes over time. This will present an opportunity to delve into the cultural and legal world of early-modern and nineteenth-century Italians, and to unveil the importance of houses for one's status.

Framing the development and directions of business sustainability efforts

2016 ◽  
Vol 16 (4) ◽  
pp. 709-725 ◽  
Author(s):  
Nils M. Høgevold ◽  
Göran Svensson
Keyword(s):  
Qualitative Study ◽  
Design Methodology ◽  
Business Networks ◽  
Convenience Sample ◽  
Content Type ◽  
Business Sustainability ◽  
The Status ◽  
Practical Implications ◽  
Over Time

Purpose The purpose of this paper is to frame the development and directions of business sustainability efforts. Design/methodology/approach A qualitative study was undertaken with respect to a convenience sample of reputable companies in Norway, which have implemented significant business sustainability efforts within their organisations, their business networks, the marketplace and in the society, beyond the level of mere compliance. Findings Different directions are associated with the development of corporate efforts in connection with business sustainability. Business sustainability efforts are not static, but dynamic and based upon continuous flexibility to changes and adaptations over time. Research Limitations/implications The current study highlights the need for further research into the development and directions of corporate efforts in connection with business sustainability in the marketplace and society. A key suggestion for further research is to further explore the existence of other directions. Practical Implications The directions reported, provide a framework to assess the development or the status of companies’ business sustainability efforts in the marketplace and society. Corporate efforts in connection with business sustainability develop over time as experiences are gained and personal impressions move the identified directions forward. Originality/value This study contributes to seven interconnected directions of corporate efforts in connection with business sustainability that are both relevant and potentially fruitful to both scholars and practitioners.

scholarly journals STATUS PERIKANAN HUHATE (POLE AND LINE) DI BITUNG, SULAWESI UTARA

2017 ◽  
Vol 14 (3) ◽  
pp. 313 ◽  
Author(s):  
Budi Nugraha ◽  
Enjah Rahmat
Keyword(s):  
Yellowfin Tuna ◽  
Fishing Ground ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Coryphaena Hippurus ◽  
North Sulawesi ◽  
The Status ◽  
Catch Composition ◽  
First Maturity

Tulisan ini menyajikan tentang status perikanan huhate di Bitung meliputi deskripsi unit penangkapan, daerah penangkapan, komposisi hasil tangkapan, catch per unit of effort, dan ukuran ikan pertama kali tertangkap. Data dikumpulkan selama tahun 2004 sampai dengan 2005. Hasil penelitian menunjukkan bahwa huhate yang terdapat di Bitung dioperasikan dengan kapal penangkapan yang terbuat dari kayu berukuran 50 sampai dengan 80 GT. Daerah penangkapan di sekitar lokasi rumpon di Laut Sulawesi dan Laut Maluku. Hasil tangkapan yang diperoleh terdiri atas cakalang (Katsuwonus pelamis), madidihang (Thunnus albacares), baby tuna (Thunnus spp.), dan tongkol (Auxis spp.) serta hasil tangkapan sampingan yaitu lemadang (Coryphaena hippurus) dan sunglir (Elagatis bipinnulatus). Hasil analisis catch per unit of effort diperoleh bahwa nilai catch per unit of effort baby tuna (Thunnus spp.) mengalami kenaikan pada bulan Agustus 2004, dan cakalang (Katsuwonus pelamis) mengalami kenaikan pada bulan September 2004. Hasil analisis terhadap ukuran pertama kali cakalang (Katsuwonus pelamis) tertangkap oleh huhate 49,3 FLcm. Ukuran ini lebih panjang dibandingkan ukuran pertama kali cakalang (Katsuwonus pelamis) matang gonad. Sedangkan hasil analisis terhadap ukuran pertama kali madidihang (Thunnus albacares) tertangkap oleh huhate 51,6 FLcm. Ukuran ini lebih pendek dibandingkan ukuran pertama kali madidihang (Thunnus albacares) matang gonad. This paper presents the status of pole and line fishery in Bitung of North Sulawesi, consisting of description of fishing gear, fishing ground, catch composition, catch per unit of effort, and length at first capture. Data were collected during the period of 2004 until 2005. Results show that the pole and line in Bitung operated by wooden vessels of 50 until 80 GT. The fishing grounds were the waters around FADs location in Sulawesi Sea and Maluku Sea. Catch composition consists of skipjack tuna (Katsuwonus pelamis), yellow fin tuna (Thunnus albacares), baby tuna (Thunnus spp.), and frigate tuna (Auxis spp.), while the bycatch consisted of dolphinfish (Coryphaena hippurus) and rainbow runner (Elagatis bipinnulatus). Catch per unit of effort analysis shows that catch per unit of effort value of baby tuna (Thunnus spp.) increased on August 2004, whereas catch per unit of effort value of skipjack tuna (Katsuwonus pelamis) increased on September 2004. The length at first capture of skipjack tuna (Katsuwonus pelamis) was 49,3 FLcm. The catch size was bigger than the length at first maturity for skipjack tuna (Katsuwonus pelamis). The length at first capture of yellowfin tuna (Thunnus albacares) was 51,6 FLcm. This catch size was smaller than the length at first maturity for yellowfin tuna (Thunnus albacares).

scholarly journals The status of the Hungarian Merino sheep breed compared to the other merino breeds

2016 ◽  
pp. 151-156
Author(s):  
Mária Szabó ◽  
Szilvia Kusza ◽  
István Csízi ◽  
István Monori
Keyword(s):  
Gene Pool ◽  
Genetic Resource ◽  
Sheep Breed ◽  
The Other ◽  
Drastic Reduction ◽  
Merino Sheep ◽  
Sheep Breeds ◽  
The World ◽  
The Status ◽  
Over Time

Merino and Merino-derived sheep breeds have been widely known and distributed across the world, both as purebred and admixed populations. They represent a diverse genetic resource which over time has been used as the basis for the development of new breeds. In spite of this, their gene-pool potential is still unexplored. The Merino sheep represent the most important sheep resource of the Hungarian husbandry. It has the largest amount of individuals between both of the stock and commercial flocks. But in Europe the Merino stocks went through a drastic reduction in number. Thus these breeds became endangered in several countries as well as in Hungary. In this study we would like to present the recent status of different Merino breeds of the world to ground our further phylogenetic research with the Hungarian Merino breed.

Sign in / Sign up

Export Citation Format

Share Document