scholarly journals Changing winter diet of thick-billed murres Uria lomvia in Southwest Greenland, 1990s versus 2010s

2021 ◽  
Author(s):  
Flemming Ravn Merkel ◽  
Jannie Fries Linnebjerg ◽  
Ole Norden Andersen ◽  
Nicholas Per Huffeldt ◽  
Teunis Jansen ◽  
...  
Keyword(s):  
Fish Species ◽  
Arctic Region ◽  
Uria Lomvia ◽  
Winter Diet ◽  
Winter Conditions ◽  
Dominant Fish ◽  
Capelin Mallotus Villosus ◽  
Wintering Area ◽  
Meganyctiphanes Norvegica ◽  
Southwest Greenland

Southwest Greenland constitutes an internationally important wintering area for seabirds, including thick-billed murres (Uria lomvia Linnaeus, 1758), but their prey may be affected by the general warming of this sub-Arctic region. We compare murre diet collected in winter in the 1990s and 2010s around Nuuk. Fish made up 36% of the diet (wet mass) and crustaceans 63% in the 1990s, changing to 22% and 78% in the 2010s, respectively. Capelin (Mallotus villosus Müller, 1776) was the dominant fish species, and the smaller contribution in the 2010s coincided with declining densities of capelin around Nuuk. The crustaceans were dominated by two krill species, Meganyctiphanes norvegica M. Sars, 1857, and Thysanoessa inermis Krøyer, 1846. However, M. norvegica was only important in the 2010s (51% wet mass), while T. inermis was dominating the 1990s with 62% wet mass and only 23% in 2010s. The dominance of M. norvegica in the 2010s confirmed our expectations of a gradual “borealization” of this region due to the generally warming sub-Arctic. The smaller contribution of fish in the diet may also support the hypothesis of deteriorating winter conditions for murres. Apart from the diet, plastic was found in 15% of the birds and 53% had parasitic nematods.

The winter diet of thick-billed murres, Uria lomvia, in western Greenland, 1988–1989

1993 ◽  
Vol 71 (2) ◽  
pp. 264-272 ◽  
Author(s):  
Knud Falk ◽  
Jan Durinck
Keyword(s):  
Body Condition ◽  
Prey Species ◽  
Stomach Contents ◽  
Uria Lomvia ◽  
Winter Diet ◽  
Southern Area ◽  
Good Body Condition ◽  
Capelin Mallotus Villosus ◽  
Wet Weight ◽  
Prey Remains

The diet of thick-billed murres (Uria lomvia) wintering in coastal western Greenland was studied by analyzing the stomach contents of 202 birds supplied by local hunters in four regions, from October 1988 to March 1989. Fish and crustaceans were present in 68 and 71% (frequency of occurrence), respectively, of all stomachs containing prey remains (n = 195). Fish made up 81% wet weight, and crustaceans most of the remaining 19%, except for < 1% squid (Gonatus sp.) and polychaetes (Nereis sp.). Capelin (Mallotus villosus) was the dominant prey species (61% wet weight), followed by Thysanoessa spp. (17%), Parathemisto spp. (1%), and Meganyctiphanes norvegica (1%). Euphausiids were the most abundant crustaceans (95% wet weight of all crustaceans), except in October, when hyperid amphipods were dominant (89%). Crustaceans were important in the murres' diet only in the northern part of the survey area; birds in the southern part preyed almost exclusively upon capelin. Most birds were in good body condition (based on the amount of body fat), but murres from the southern area had a slightly higher mean fat index than those from the northern area (7.19 vs. 5.35). We suggest that differences in body condition may be related to the higher proportion of fish, which is of higher caloric value, in the diet of murres in the southern area.

Recent changes in the winter diet of murres (Uria spp.) in coastal Newfoundland waters

2000 ◽  
Vol 78 (3) ◽  
pp. 495-500 ◽  
Author(s):  
Sherrylynn Rowe ◽  
Ian L Jones ◽  
John W Chardine ◽  
Richard D Elliot ◽  
Brian G Veitch
Keyword(s):  
Marine Organisms ◽  
Frequency Of Occurrence ◽  
Boreogadus Saida ◽  
Sources Of Information ◽  
Uria Lomvia ◽  
Northwest Atlantic ◽  
Winter Diet ◽  
Ecological Changes ◽  
Common Murres ◽  
Capelin Mallotus Villosus

We investigated the winter diet of murres (Uria spp.) in coastal Newfoundland waters in relation to environmental and ecological changes that have occurred in the Northwest Atlantic since the 1980s. We analyzed the contents of 371 stomachs (311 from Thick-billed Murres, Uria lomvia, and 60 from Common Murres, Uria aalge) of birds shot by hunters around the Newfoundland coast during the winters of 1996-1998. We observed that the frequency of empty stomachs was greater in our study than in a similar study conducted during 1984-1986. We found no difference in the proportion of fish in the diet between the 1980s and the 1990s, however, Arctic cod (Boreogadus saida; from 55 to 12%) and capelin (Mallotus villosus; from 28 to 6%) decreased in frequency of occurrence. The proportion of stomachs containing crustaceans and squid did not change between the 1980s and 1990s, but hyperiid amphipods (Parathemisto spp.) replaced euphausiids (Thysanoessa spp.) as the predominant crustacean. Changes in murre winter diet off the coast of Newfoundland corroborate other sources of information indicating that major changes in the distribution and biology of marine organisms occurred in the Northwest Atlantic during the 1990s.

Temporo-spatial heterogeneity of dominant fish species in the Jiaozhou Bay community

2017 ◽  
Vol 24 (5) ◽  
pp. 1091
Author(s):  
Jia WO ◽  
Binduo XU ◽  
Ying XUE ◽  
Yiping REN ◽  
Chongliang ZHANG
Keyword(s):  
Spatial Heterogeneity ◽  
Fish Species ◽  
Jiaozhou Bay ◽  
Dominant Fish

scholarly journals Zooplankton composition and trophic status of hydrobionts of the Laptev and East Siberian seas

2019 ◽  
Vol 59 (6) ◽  
pp. 987-997
Author(s):  
K. M. Gorbatenko ◽  
S. I. Kiyashko
Keyword(s):  
Fish Species ◽  
Trophic Status ◽  
Northwestern Part ◽  
Gut Content Analysis ◽  
Boreogadus Saida ◽  
Gut Content ◽  
Summer Period ◽  
East Siberian Sea ◽  
Dominant Fish ◽  
The Laptev Sea

Species composition, density, biomass and distribution of zooplankton on shelf and slope of northwestern part of the Laptev Sea and shallow-water shelf of the East Siberian Sea were studied in 2015 summer period. Using analysis of stable isotopes of carbon (13 С) and nitrogen (15N), trophic status of abundant zooplankton and fish species, and their positions in food webs of these two seas, were compared. Gut content analysis, as well stable isotope data, showed mutual changes in the trophic status of dominant fish species arctic cod, Boreogadus saida, with age.

scholarly journals Catch assessment of artisanal marine fishing gears in Cox’s Bazar and Teknaf of Bangladesh

2016 ◽  
Vol 27 (2) ◽  
pp. 228-234
Author(s):  
SK Ghosh ◽  
MK Ahsan ◽  
MK Ahmmed ◽  
SI Ahmed ◽  
MM Hasan ◽  
...  
Keyword(s):  
Fish Species ◽  
Fishing Gear ◽  
Catch Per Unit Effort ◽  
Beach Seine ◽  
Gill Net ◽  
Fishing Gears ◽  
Dominant Fish ◽  
Commercially Important ◽  
Marine Fishing ◽  
Harpadon Nehereus

Studies were conducted on catch assessment of some artisanal marine fishing gears operated in Cox’s Bazar and Teknaf areas from April 2014 to April 2015. Sixteen types of fishing gears were identified, of which gill net, beach seine net, estuarine set bag net, marine set bag net and trammel net occupy major fishing activities. Although estuarine set bag net (ESBN) is a legally restricted fishing gear recorded the highest catch per unit effort (CPUE) (110 kg/gear/day) in July followed by marine set bag net (MSBN) (105 kg/gear/day) in Cox’s Bazar and the highest CPUE was recorded 100 kg/gear/day by ESBN in June followed by MSBN (90 kg/gear/day) in Teknaf. Out of 52 species of fishes, the major fish species abundantly caught by these gears were Poa (Otolithoides argenteus), Churi (Trichiurus haumela), Loittya (Harpadon nehereus), Ranga choukha (Lutjanus johni), Lal poa (Johnius argentatus), Olua (Coilia dussumieri), Rup chanda (Stromateus chinensis), (Stromateus argenteus) and Ilish (Tenualosa ilisha). Besides these fish species, 10 commercially important shrimp species and 3 important crab species were also recorded during the study period. The peak season of availability of most fish species was June and July while lean season was December and January. This study indicated that Otolithoides argenteus) was the dominant fish species followed by Trichiurus haumela, Harpadon nehereus and Coilia dussumieri.Progressive Agriculture 27 (2): 228-234, 2016

scholarly journals The significance of Southwest Greenland as winter quarters for seabirds

2004 ◽  
Vol 14 (2) ◽  
pp. 87-112 ◽  
Author(s):  
DAVID BOERTMANN ◽  
PETER LYNGS ◽  
FLEMMING RAVN MERKEL ◽  
ANDERS MOSBECH
Keyword(s):  
Common Eider ◽  
Somateria Mollissima ◽  
Uria Lomvia ◽  
Little Auk ◽  
Alle Alle ◽  
King Eider ◽  
Numerous Species ◽  
Breeding Populations ◽  
Southwest Greenland ◽  
Brunnich’S Guillemot

The coastal and offshore waters of Southwest Greenland are internationally important winter quarters for seabirds. We crudely estimate a minimum of 3.5 million seabirds using the region in winter, mainly from Arctic Canada, Greenland and Svalbard, with smaller numbers also from Alaska, Iceland, mainland Norway and Russia. The most numerous species are Common Eider Somateria mollissima, King Eider S. spectabilis, Brünnich's Guillemot Uria lomvia and Little Auk Alle alle. The most immediate threat to the seabirds in Southwest Greenland is hunting, and current levels of usage of the Greenland breeding populations of Brünnich's Guillemot and Common Eider are considered unsustainable. Conservation measures are required for these populations.

scholarly journals FISH DIVERSITY OF GHODAGHODI LAKE IN KAILALI, FAR-WEST NEPAL

2017 ◽  
Vol 22 (1) ◽  
pp. 120-126
Author(s):  
Dipendra Joshi ◽  
Bijaya K. C.
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Fish Species ◽  
Diversity Index ◽  
Fish Diversity ◽  
Channa Striatus ◽  
Illegal Fishing ◽  
Dominant Fish ◽  
Fish Catch ◽  
Excessive Proliferation

Ghodaghodi Lake is an ox-bow perennial lake of Ghodaghodi Lake Complex, situated in Kailali district. The present study was conducted to understand the fish diversity, community structure and distribution pattern in Ghodaghodi Lake. A total of 13 fish species were recorded from the different section of Ghodaghodi Lake, belonging to five order, eight family and eleven genera. According to fish catch the dominant order and family of Ghodaghodi Lake were found to be Cypriniformes (40%) and Cyprinidae (40%) respectively. The dominant fish species of Ghodaghodi Lake was Labeo gonius followed by Mystus tengara, Nandus nandus and Channa striatus. The highest diversity index (2.46), species richness (6.14) and evenness (0.96) of fish were recorded from station III during the month of January. Lowest diversity index (1.75) and evenness (0.90) was found in station II and during the month of October (2.25 and 0.88). Similarly, lowest species richness was found in station I (3.91) and during the month of July (5.82). Fish diversity and number in Ghodaghodi Lake were found to have decreased. This could be due to pollution, illegal fishing and excessive proliferation of aquatic weeds.Journal of Institute of Science and TechnologyVolume 22, Issue 1, July 2017, page: 120-126

scholarly journals Feeding ecology of dominant fish species from beach seine discards (Praia de Mira, Central Portugal)

2016 ◽  
Vol 3 ◽  
Author(s):  
Seabra Pedro ◽  
Louro Inês ◽  
Neves Pedro ◽  
Vieira Rui ◽  
Cunha Marina
Keyword(s):  
Fish Species ◽  
Feeding Ecology ◽  
Beach Seine ◽  
Dominant Fish ◽  
Central Portugal

scholarly journals Ichthyofauna Checklist in Tributaries of Muda Reservoir, Kedah, Peninsular Malaysia

2021 ◽  
Vol 2 (1) ◽  
pp. 17-24
Author(s):  
Nor Aziella Mohd Rosli ◽  
Nurul Shafikah Mohd Noor ◽  
Khaironizam Md Zain
Keyword(s):  
Fish Species ◽  
Mesh Size ◽  
Peninsular Malaysia ◽  
Anabas Testudineus ◽  
Fish Family ◽  
Lotic Ecosystem ◽  
Dominant Fish ◽  
The Future ◽  
Geographical Locations

Ichthyofauna checklist was scrutinized in tributaries of Muda Reservoir. A total of 5998 specimens were caught using a cast net of 2.5 cm mesh size. Amongst these specimen, 30 fish species from 12 families were recorded. The most dominant fish family in this lotic ecosystem was Cyprinidae. Rasbora dusonensis, Cyclocheilichthys apogon and Mystacoleucus marginatus recorded the uppermost distribution compared to other fish species found in this tributaries. Six fish species were the newly recorded species found in tributaries of Muda Reservoir; Barbonymus gonionotus, Luciosoma setigerum, Toxabramis houdemeri, Mystus singaringan, Anabas testudineus and Trichopodus pectoralis. In accordance with the previous combination of recorded fish species in tributaries of Muda Reservoir, a total of 57 updated total numbers of fish species were recorded. The information obtained in present study will update the latest ichthyofauna checklist in tributaries of Muda Reservoir, as well as for the future comparison in other geographical locations.

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