Marine fish diversity on the Scotian Shelf, Canada

2003 ◽  
Vol 13 (4) ◽  
pp. 305-321 ◽  
Author(s):  
Nancy L. Shackell ◽  
Kenneth T. Frank
Keyword(s):  
Marine Fish ◽  
Fish Diversity ◽  
Scotian Shelf

scholarly journals Evaluating a habitat template model's predictions of marine fish diversity on the Scotian Shelf and Bay of Fundy, Northwest Atlantic

2011 ◽  
Vol 68 (10) ◽  
pp. 2096-2105 ◽  
Author(s):  
Jonathan A. D. Fisher ◽  
Kenneth T. Frank ◽  
Vladimir E. Kostylev ◽  
Nancy L. Shackell ◽  
Tracy Horsman ◽  
...  
Keyword(s):  
Life History ◽  
Species Diversity ◽  
Community Composition ◽  
Marine Fish ◽  
Fish Species ◽  
Life History Traits ◽  
Fish Diversity ◽  
Bay Of Fundy ◽  
Scotian Shelf ◽  
Habitat Template

Abstract Fisher, J. A. D., Frank, K. T., Kostylev, V. E., Shackell, N. L., Horsman, T., and Hannah, C. G. 2011. Evaluating a habitat template model's predictions of marine fish diversity on the Scotian Shelf and Bay of Fundy, Northwest Atlantic. – ICES Journal of Marine Science, 68: 2096–2105. Habitat template models that integrate physical, chemical, and biological data have the potential to explain geographic variation in life-history traits within assemblages and to predict locations where species will be most vulnerable to anthropogenic impact. A previously developed model based on spatial variations in scope for growth (SG) and natural disturbance (ND) for the Scotian Shelf/Bay of Fundy was tested for its ability to predict fish life-history traits, species diversity, and community composition using trawl survey data. Of 30 dominant fish species, large, slow-growing ones most vulnerable to overexploitation tended to be found in naturally stable habitats. Among consistently co-occurring groups, functional differentiation, rather than similarity of life history, characterized assemblages, whereas among survey strata, species richness peaked at intermediate levels of ND and species evenness increased with average SG. Community composition was significantly correlated with both habitat variables, declined by 40% through time preceding structural changes on the eastern Scotian Shelf, but geographic distance, depth, and bottom temperature remained more strongly related to composition. The results revealed compelling matches between template predictions and patterns of fish species diversity, but low variation in diversity of life history, and mobility of fish may account for some of the weaker matches to model predictions.

Larval fish diversity on the Scotian Shelf

2000 ◽  
Vol 57 (9) ◽  
pp. 1747-1760 ◽  
Author(s):  
N L Shackell ◽  
K T Frank
Keyword(s):  
Larval Fish ◽  
Diversity Indices ◽  
Fish Diversity ◽  
Calanoid Copepods ◽  
Scotian Shelf ◽  
Genus Richness ◽  
Using Data ◽  
Negative Exponential ◽  
Number Of Individuals ◽  
The Relationship

We examined larval fish diversity on the Scotian Shelf using data, representing 91 genera, collected during the Scotian Shelf Ichthyoplankton Program from 1978 to 1982. Two diversity indices (genus richness (GR) and Shannon's entropy (H)) were relatively lower from December to February-March and relatively higher and stable from April to September-October. Taxon composition changed seasonally. Total median log abundance (log10(number of individuals + 1)·1000 m-3) was low from December to February, increased in March, was stable from April to June, and declined from July to October. Our results suggest that the abundance trends of most taxa were not coincident with either a spring or fall bloom of calanoid copepods. Log GR was significantly positively related to H (r = 0.62, p < 0.001, n = 1853). A negative exponential best described the relationship between log GR and log abundance (R2 = 0.77; log GR = 1.37(1 – e-(1.13)(log abundance)), p < 0.001, n = 2357). Shannon's H was not related to log abundance in winter or in summer-fall and was negatively correlated in spring-summer (r = -0.12, p = 0.003, n = 593). Thus, diversity increases with abundance but the composition is dominated by relatively fewer genera at higher levels of abundance. Western - Sable Island banks had higher levels of GR and abundance in all seasons. Additional banks were diverse and productive during warmer months.

scholarly journals Marine fish diversity: history of knowledge and discovery (Pisces)

Zootaxa ◽  
2010 ◽  
Vol 2525 (1) ◽  
pp. 19 ◽  
Author(s):  
WILLIAM N. ESCHMEYER ◽  
RONALD FRICKE ◽  
JON D. FONG ◽  
DENNIS A. POLACK
Keyword(s):  
Marine Fish ◽  
New Genus ◽  
Soil Samples ◽  
Fish Diversity ◽  
Monotypic Genus ◽  
History Of Knowledge ◽  
History Of

A new monotypic genus, Bloszykiella africana gen. nov., sp. nov. (Mesostigmata: Uropodina: Uropodidae) is described on the basis of two females and one deutonymph found in soil samples from Tanzania. The new genus is unusual among Uropodina in having large strongly dentate chelicerae.

Marine fish diversity in Tropical America associated with both past and present environmental conditions

2020 ◽  
Vol 47 (12) ◽  
pp. 2597-2610
Author(s):  
Andrea Polanco F. ◽  
Fabian Fopp ◽  
Camille Albouy ◽  
Philipp Brun ◽  
Lydian Boschman ◽  
...  
Keyword(s):  
Marine Fish ◽  
Environmental Conditions ◽  
Fish Diversity ◽  
Tropical America

Blood parasites of fish from the northwestern Atlantic Ocean

1980 ◽  
Vol 58 (5) ◽  
pp. 770-781 ◽  
Author(s):  
R. A. Khan ◽  
M. Barrett ◽  
J. Murphy
Keyword(s):  
Atlantic Ocean ◽  
Marine Fish ◽  
Cold Water ◽  
The Other ◽  
Blood Parasites ◽  
Scotian Shelf ◽  
Blood Smears ◽  
Water Species ◽  
Cold Water Species ◽  
Thin Blood Smears

Examination of thick and thin blood smears from 5013 marine fish from the northwestern Atlantic Ocean revealed 25 of 59 species to be infected with one or more of the following blood parasites: trypanosomes (27% of 3610), trypanoplasms (9% of 588), piroplasms (26% of 2584), and haemogregarines (36% of 1708). Higher prevalences of infection were observed in cold-water, benthic, sedentary fish than in warm-water, littoral, epipelagic, or midwater species. Trypanosome infections were more prevalent among fish taken off the Labrador – east Newfoundland coasts, lower in those from St. Pierre Bank, Grand Bank, and Gulf of St. Lawrence, and lowest in forms from the Scotian Shelf. Seven of nine species of hematophagous leeches harboured asexual stages of haemogregarines, whereas natural infections of trypanosomes occurred in one leech, Johanssonia arctica. Using five species of laboratory-reared leeches and laboratory-initiated infections of trypanosomes in piscine hosts, development of Trypanosoma murmanensis was observed only in J. arctica. It is suggested that the distribution of trypanosomes of marine fish is related to that of J. arctica, a cold-water species, whereas the other haematozoan infections might be attributed to those leech species that are associated with their respective piscine hosts.

scholarly journals An updated checklist of the marine fish fauna of Redang Islands, Malaysia

2019 ◽  
Vol 7 ◽  
Author(s):  
Jianguo Du ◽  
Kar-Hoe Loh ◽  
Wenjia Hu ◽  
Xinqing Zheng ◽  
Yang Amri Affendi ◽  
...  
Keyword(s):  
Coral Reef ◽  
Marine Fish ◽  
Census Data ◽  
Diversity Index ◽  
Fish Fauna ◽  
Reef Fishes ◽  
Sandy Beaches ◽  
Peninsular Malaysia ◽  
Fish Diversity ◽  
Epinephelus Fuscoguttatus

Redang Islands Marine Park consists of nine islands in the state of Terengganu, Malaysia. Redang Island is one of the largest off the east coast of Peninsular Malaysia, which is famous for its crystal-clear waters and white sandy beaches. The ichthyofauna of the Redang archipelago was surveyed by underwater visual observations between August 2016 and May 2018. Census data were compiled with existing records into the checklist of the marine fish of the Redang archipelago presented herein. A total of 314 species belonging to 51 families were recorded. The most speciose families (Pomacentridae, Labridae, Scaridae, Serranidae, Apogonidae, Carangidae, Gobiidae, Chaetodontidae, Lutjanidae, Nemipteridae and Siganidae) were also amongst the most speciose at the neighbouring Tioman archipelago (except Chaetodontidae). The coral fish diversity index value for the six families of coral reef fishes (Chaetodontidae, Pomacanthidae, Pomacentridae, Labridae, Scaridae and Acanthuridae) of the study sites was 132. We estimated that there were 427 coral reef fish species in the Redang archipelago. According to the IUCN Red List, eight species are Near Threatened (Carcharhinus melanopterus, Chaetodon trifascialis, Choerodon schoenleinii, Epinephelus fuscoguttatus, E. polyphekadion, Plectropomus leopardus, Taeniura lymma and Triaenodon obesus), eleven are Vulnerable (Bolbometopon muricatum, Chaetodon trifasciatus, Chlorurus sordidus, Dascyllus trimaculatus, Epinephelus fuscoguttatus, E. polyphekadion, Halichoeres marginatus, Heniochus acuminatus, Nebrius ferrugineus, Neopomacentrus cyanomos and Plectropomus areolatus) and three are Endangered (Amphiprion clarkia, Cheilinus undulatus and Scarus ghobban) in the Redang archipelago. Five species are new records for Malaysia (Ctenogobiops mitodes, Epibulus brevis, Halichoeres erdmanni, H. richmondi and Scarus caudofasciatus) and 25 species are newly recorded in the Redang archipelago.

scholarly journals Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation

2020 ◽  
Vol 18 (4) ◽  
Author(s):  
Caio R. Pimentel ◽  
Luiz A. Rocha ◽  
Bart Shepherd ◽  
Tyler A. Y. Phelps ◽  
Jean-Christophe Joyeux ◽  
...  
Keyword(s):  
New Species ◽  
Marine Fish ◽  
Fish Species ◽  
New Records ◽  
Fish Diversity ◽  
Remotely Operated Vehicle ◽  
Western Atlantic ◽  
Fernando De Noronha

Abstract Although several studies on the ichthyofauna of the Fernando de Noronha Archipelago have been carried out, its mesophotic fish diversity has never been surveyed before. Here we used SCUBA and technical rebreather diving, baited remote underwater videos and remotely operated vehicle to record shallow (≤ 30 m depth) and mesophotic (31 to 150 m depth) fishes. Nineteen fish species belonging to 14 families are reported here as new records, representing an increase of 8.2% in marine fish richness for the region, which now has a total of 250 species and 77 families. These new records include four potential new species and highlight the importance of surveying mesophotic ecosystems, even in well studied sites. Our results also emphasize the need for protection and attention to the unique ichthyofauna found at mesophotic depths.

scholarly journals Marine water environmental DNA metabarcoding provides a comprehensive fish diversity assessment and reveals spatial patterns in a large oceanic area

2019 ◽  
Author(s):  
Natalia Fraija-Fernández ◽  
Marie-Catherine Bouquieaux ◽  
Anaïs Rey ◽  
Iñaki Mendibil ◽  
Unai Cotano ◽  
...  
Keyword(s):  
Marine Fish ◽  
Environmental Dna ◽  
Distribution Patterns ◽  
Abundant Species ◽  
Fish Diversity ◽  
12S Rrna ◽  
Rrna Gene ◽  
Ecological Knowledge ◽  
Diversity Assessment ◽  
The Common

AbstractCurrent methods for monitoring marine fish diversity mostly rely on trawling surveys, which are invasive, costly and time-consuming. Moreover, these methods are selective, targeting a subset of species at the time, and can be inaccessible to certain areas. Here, we explore the potential of environmental DNA (eDNA), the DNA present in the water column as part of shed cells, tissues or mucus, to provide comprehensive information about fish diversity in a large marine area. Further, eDNA results were compared to the fish diversity obtained in pelagic trawls. A total of 44 5L-water samples were collected onboard a wide-scale oceanographic survey covering about 120,000 square kilometres in Northeast Atlantic Ocean. A short region of the 12S rRNA gene was amplified and sequenced through metabarcoding generating almost 3.5 million quality-filtered reads. Trawl and eDNA samples resulted in the same most abundant species (European anchovy, European pilchard, Atlantic mackerel and blue whiting), but eDNA metabarcoding resulted in more detected fish and elasmobranch species (116) than trawling (16). Although an overall correlation between fish biomass and number of reads was observed, some species deviated from the common trend, which could be explained by inherent biases of each of the methods. Species distribution patterns inferred from eDNA metabarcoding data coincided with current ecological knowledge of the species, suggesting that eDNA has the potential to draw sound ecological conclusions that can contribute to fish surveillance programs. Our results support eDNA metabarcoding for broad scale marine fish diversity monitoring in the context of Directives such as the Common Fisheries Policy or the Marine Strategy Framework Directive.

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