Proximate composition, energetic value, and relative abundance of prey fish from the inshore eastern Bering Sea: implications for piscivorous predators

Ball, Jeffrey R.; Esler, Daniel; Schmutz, Joel A.

doi:10.1007/s00300-006-0227-1

Cited by 33 publications

(30 citation statements)

References 41 publications

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“…For marine birds, this connection, although intuitive, is difficult to quantify given the expense and effort required to measure fish abundance and species composition in marine habitats at relevant spatial scales . We found that Red-throated Loon chicks with a sibling present had lower progeny DSP at the Manokinak River in 2002 and 2003, which is consistent with the hypothesis that food limited chick survival in those years (Ball 2004, Ball et al 2007). Presence of a sibling may also lower daily survival probability due to increased visibility of the brood to predators, higher vulnerability of the junior chick to predation, or reduced adult attendance caused by increased provisioning demand.…”

Section: Discussionsupporting

confidence: 88%

“…Periods of poor productivity would therefore have to be prolonged over multiple years to induce a decline in the breeding population independent of changes in adult survival because of the low turnover rate of breeding adults. Changes in the availability of marine prey associated with the Pacific Decadal Oscillation (Mantua et al 1997, Minobe 1997) provide a potential mechanism for bottom-up effects on Red-throated Loon populations (Ball 2004, Ball et al 2007) because changes in the marine ecosystem occur at decadal timescales. Further, if Redthroated Loon populations are regulated by decadal-scale oscillations in the marine environment, population declines persisting for longer than such oscillations should raise the most concern for conservation and suggest management actions.…”

Section: Discussionmentioning

confidence: 99%

“…Ball (2004) and Ball et al (2007) hypothesized a connection between the availability of marine prey and Red-throated Loon breeding success. According to this hypothesis, changes in abundance have occurred through bottom-up effects on productivity.…”

Section: Introductionmentioning

confidence: 98%

“…progeny survival). Given results of a previous study showing low chick growth rates and low availability of energy-rich forage fish species (Ball 2004, Ball et al 2007), we examined the association between brood size and DSP during the chick-rearing period. We predicted that the presence of a sibling would be associated with reduced DSP during chick rearing if food availability was limited.…”

Section: Introductionmentioning

confidence: 99%

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Factors influencing nest survival and productivity of Red-throated Loons (Gavia stellata) in Alaska

et al. 2014

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Identifying post-breeding migration and wintering distributions of migratory birds is important for understanding factors that may drive population dynamics. Red-throated Loons (Gavia stellata) are widely distributed across Alaska and currently have varying population trends, including some populations with recent periods of decline. To investigate population differentiation and the location of migration pathways and wintering areas, which may inform population trend patterns, we used satellite transmitters (n = 32) to describe migration patterns of four geographically separate breeding populations of Red-throated Loons in Alaska. On average (± SD) Red-throated Loons underwent long (6,288 ± 1,825 km) fall and spring migrations predominantly along coastlines. The most northern population (Arctic Coastal Plain) migrated westward to East Asia and traveled approximately 2,000 km farther to wintering sites than the three more southerly populations (Seward Peninsula, Yukon-Kusko-kwim Delta, and Copper River Delta) which migrated south along the Pacific coast of North America. These migration paths are consistent with the hypothesis that Red-throated Loons from the Arctic Coastal Plain are exposed to contaminants in East Asia. The three more southerly breeding populations demonstrated a chain migration pattern in which the more northerly breeding populations generally wintered in more northerly latitudes. Collectively, the migration paths observed in this study demonstrate that some geographically distinct breeding populations overlap in wintering distribution while others use highly different wintering areas. Red-throated Loon population trends in Alaska may therefore be driven by a wide range of effects throughout the annual cycle.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Factors influencing nest survival and productivity of Red-throated Loons (Gavia stellata) in Alaska

et al. 2014

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“…Values of the overall means of various parameters of composition (water, fat, protein, organic and ash contents), analyzed in the whole wet body weight of wild Mystus bleekeri have values that are very similar to those reported for the whole body composition of various species, whether farmed or wild Pongchawee et al, 1995;Oliveira, 2003;Ball, 2007;Turan, 2007;Naeem et al, 2010a;. Predictive equations using regression analysis were developed in this study, as many workers have found high degree of accuracy by using it.…”

Section: Discussionmentioning

confidence: 76%

Proximate composition of Mystus bleekeri in relation to body size and condition factor from Nala Daik, Sialkot, Pakistan

Naeem¹,

Ishtiaq²

2011

Afr. J. Biotechnol.

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Proximate composition of small catfish, Mystus bleekeri, from Nala Daik, Sialkot, Pakistan was investigated and fluctuation in relation to body size and condition factor was carried out. Mean percentages for water, fat, protein and ash contents in the whole wet body weight of wild M. bleekeri were 77.87, 3.26, 15.01 and 3.87%, respectively. Body composition of the fish was effected by body size; however, condition factor remains constant with observed body constituents (% water, fat, protein, ash and organic contents). Highly significant (P<0.001) correlation Found between percentage water and percentage fat, protein, ash and organic contents in both wet and dry body weight. Investigation of body size on body constituents Reflected decrease in relative amount of water, skeleton (wet and dry weight), increase in fat (dry weight), protein, organic contents (wet and dry weight), and no effect on fat (wet weight) with growth of fish. Additionally, the first reference for proximate composition for M. bleekeri is provided.

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2013

Condition and Health Indicators of Exploited Marine Fishes

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Proximate composition, energetic value, and relative abundance of prey fish from the inshore eastern Bering Sea: implications for piscivorous predators

Cited by 33 publications

References 41 publications

Factors influencing nest survival and productivity of Red-throated Loons (Gavia stellata) in Alaska

Factors influencing nest survival and productivity of Red-throated Loons (Gavia stellata) in Alaska

Proximate composition of Mystus bleekeri in relation to body size and condition factor from Nala Daik, Sialkot, Pakistan

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