Conservation management and sustainable harvest quotas are sensitive to choice of climate modelling approach for two marine gastropods

2013 ◽  
Vol 19 (10) ◽  
pp. 1299-1312 ◽  
Author(s):  
D. A. Fordham ◽  
B. W. Brook ◽  
M. J. Caley ◽  
C. J. A. Bradshaw ◽  
C. Mellin
Keyword(s):  
Conservation Management ◽  
Climate Modelling ◽  
Sustainable Harvest ◽  
Marine Gastropods ◽  
Harvest Quotas ◽  
Modelling Approach

Demographic and risk analyses of spiny dogfish (Squalus suckleyi) in the Gulf of Alaska using age- and stage-based population models

2011 ◽  
Vol 62 (12) ◽  
pp. 1395 ◽  
Author(s):  
Cindy A. Tribuzio ◽  
Gordon H. Kruse
Keyword(s):  
Input Parameter ◽  
Gulf Of Alaska ◽  
Spiny Dogfish ◽  
Fishing Mortality ◽  
Sustainable Harvest ◽  
Demographic Models ◽  
The World ◽  
Slow Growing ◽  
Cohort Analyses ◽  
Modelling Approach

Demographic models are useful tools for assessing data-limited species and may be an appropriate alternative to cohort analyses for sharks due to their long-lived, slow-growing nature. In this study, age- and stage-based demographic analyses were conducted to examine the intrinsic rebound potential (r) and potential risk of fishing for spiny dogfish (Squalus suckleyi) in the Gulf of Alaska. Monte Carlo simulations were conducted to incorporate input parameter uncertainty. For an unfished population, r was estimated to be 0.02–0.03 year–1. Fishing mortalities (F) of F = 0.04 and 0.03 (age- and stage-based models respectively), resulted in r = 0, indicating that populations fished at higher F are not sustainable. Harvest strategies targeting juveniles (age-based model) and subadults (stage-based model) caused the highest risk of the population falling below defined thresholds (BMSY, B40% and B50%) after 20 years. The age- and stage-based models provided similar estimates of r and sustainable fishing mortality, suggesting that the stage-based model is an appropriate substitute for the age-based model in this case. S. suckleyi and the closely related S. acanthias are often harvested around the world and this modelling approach could be useful to the management of these species and other sharks where data is limited.

scholarly journals SURGE AND WAVE CONDITIONS UNDER WARMER ICE-FREE ARCTIC OCEAN

2020 ◽  
pp. 39
Author(s):  
Martin Mall ◽  
Ryota Nakamura ◽  
Tomoya Shibayama
Keyword(s):  
Negative Impact ◽  
Arctic Basin ◽  
Coastal Communities ◽  
The Arctic ◽  
Climate Modelling ◽  
Sea Ice Extent ◽  
The Past ◽  
Wide Range ◽  
Global And Local ◽  
Modelling Approach

In the past decade the fast changes within the Arctic basin have become more pronounced. The Arctic amplification has an extremely wide range of global and local implications. The latter has already caused negative impact to coastal communities along the Arctic coastline, where the decreasing annual sea ice extent leaves much of the coastal water open for potential high wave attacks for a longer period of time. The study aims to investigate the use of pseudo-climate modelling approach in the Arctic by looking at meteorology, surge and waves.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/SjVaZRnFva8

Distribution, ecological attributes and trade of the New Guinea carpet python (Morelia spilota) in Indonesia

2011 ◽  
Vol 59 (4) ◽  
pp. 236 ◽  
Author(s):  
Daniel J. D. Natusch ◽  
Jessica A. Lyons
Keyword(s):  
Papua New Guinea ◽  
Small Area ◽  
Conservation Management ◽  
New Guinea ◽  
Pet Trade ◽  
Trade Data ◽  
Ecological Information ◽  
Ecological Attributes ◽  
West Papua ◽  
Harvest Quotas

Carpet pythons (Morelia spilota) are medium-sized non-venomous snakes inhabiting most of continental Australia and a small area of New Guinea. They have been relatively well studied in Australia, but little is known about the New Guinea population, even though it is harvested and exported from Indonesia for the international pet trade. In total, 281 locality records were compiled for two distinct populations south of latitude 7°S in Papua New Guinea and the Indonesian province of Papua. Traders in Papua collected 274 carpet pythons (most of which were recently hatched neonates) for the pet trade. Data from a sample of 174 individuals revealed little sexual dimorphism in any traits, although males appear to grow larger than females despite females maturing at greater lengths. Fecundity was high (average 17 eggs) and reproduction was highly seasonal, with hatching in December and January. Harvest quotas for the province of Papua were exceeded in all years between 2000 and 2009 due to 50% of the national quota being allocated to West Papua province where this species is yet to be recorded. The present study provides distribution, trade and ecological information to inform conservation management of this species in Indonesia.

Assessing the ecosystem impact of scallop bottom culture through a community analysis and trophic modelling approach

2016 ◽  
Vol 547 ◽  
pp. 121-135 ◽  
Author(s):  
LC Kluger ◽  
MH Taylor ◽  
E Barriga Rivera ◽  
E Torres Silva ◽  
M Wolff
Keyword(s):  
Community Analysis ◽  
Bottom Culture ◽  
Modelling Approach

Reverse Transcribing Climate Change

2012 ◽  
Vol 34 (2) ◽  
pp. 277-293 ◽  
Author(s):  
Sam Solnick
Keyword(s):  
Climate Change ◽  
Information Theory ◽  
Climate Modelling ◽  
Economic Issues ◽  
Starting Point ◽  
Scientific Competence

This paper suggests that certain conceptual, ethical and economic issues surrounding genetics are also relevant to the challenges that climate change poses to the humanities. It takes J.H. Prynne's and Derrida's engagements with biology and information theory as a starting point to address climate modelling, emissions management, biofuels, bioengineering and the importance of scientific competence.

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