Seasonal Distribution and Site Fidelity in Great Lakes Caspian Terns

1988 ◽  
Vol 11 (2) ◽  
pp. 202 ◽  
Author(s):  
Louis L'Arrivee ◽  
Hans Blokpoel
Keyword(s):  
Great Lakes ◽  
Site Fidelity ◽  
Seasonal Distribution ◽  
Caspian Terns

Great Lakes Caspian Terns: Egg Contaminants and Biological Implications

1985 ◽  
Vol 8 (2) ◽  
pp. 142 ◽  
Author(s):  
John Struger ◽  
D. Vaughn Weseloh
Keyword(s):  
Great Lakes ◽  
Caspian Terns

scholarly journals Organochlorine-Associated Immunosuppression in Prefledgling Caspian Terns and Herring Gulls from the Great Lakes: An Ecoepidemiological Study

1996 ◽  
Vol 104 ◽  
pp. 829 ◽  
Author(s):  
Keith A. Grasman ◽  
Glen A. Fox ◽  
Patrick F. Scanlon ◽  
James P. Ludwig
Keyword(s):  
Great Lakes ◽  
Herring Gulls ◽  
Caspian Terns

Embryonic abnormalities and organochlorine contamination in double-crested cormorants (Phalacrocorax auritus) and Caspian terns (Hydroprogne caspia) from the upper Great Lakes in 1988

1993 ◽  
Vol 79 (2) ◽  
pp. 163-173 ◽  
Author(s):  
Nobuyoshi Yamashita ◽  
Shinsuke Tanabe ◽  
James P. Ludwig ◽  
Hiroko Kurita ◽  
Matthew E. Ludwig ◽  
...  
Keyword(s):  
Great Lakes ◽  
Phalacrocorax Auritus ◽  
Upper Great Lakes ◽  
Caspian Terns

Seasonal Distribution and Site Tenacity of the Great Lakes Common Tern

Bird-Banding ◽  
1978 ◽  
Vol 49 (2) ◽  
pp. 142 ◽  
Author(s):  
Gerard T. Haymes ◽  
Hans Blokpoel
Keyword(s):  
Great Lakes ◽  
Seasonal Distribution ◽  
Common Tern ◽  
Site Tenacity

Intraclutch egg-weight apportionment and chick survival in Caspian terns

1986 ◽  
Vol 64 (10) ◽  
pp. 2116-2122 ◽  
Author(s):  
James S. Quinn ◽  
Ralph D. Morris
Keyword(s):  
Body Size ◽  
Great Lakes ◽  
Potential Benefit ◽  
Brood Reduction ◽  
Chick Survival ◽  
Egg Weight ◽  
Parental Response ◽  
Main Effect ◽  
Caspian Terns ◽  
Negative Effect

Egg-weight apportionment patterns and chick survival were investigated in two-egg clutches of Caspian terns(Sterna caspia) in the Great Lakes. First-laid eggs (A eggs) were typically heavier than second-laid eggs (B eggs) and hatched an average of 1.8 days earlier. The A-egg fraction of total clutch weight increased with total clutch weight. Increased egg weight did not increase the probability of hatching, but did increase the fledging success of A chicks: specifically, A eggs that produced fledglings were significantly heavier than those whose chicks did not fledge. No such relationship held for B eggs. The main effect of B-egg weight was in prolonging life: excluding those few that fledged, egg weight was correlated significantly with age at mortality. Chick mortality appeared to be due mainly to starvation and gull predation. We suspect that greater body size and (or) behaviour associated with body size helps chicks escape risk from gape-limited predators. The hatching of A eggs had a negative effect on the survival of B chicks, but the reverse was not true. B offspring may act as insurance against the loss of A siblings. The potential benefit to parents of investing more in B eggs appears to be constrained by sibling competition with A chicks, which often results in brood reduction. The pattern of egg-weight apportionment in eggs is interpreted as a parental response to the differences in the reproductive values of asynchronously hatching chicks.

scholarly journals Habitat selection and foraging site fidelity in Caspian Terns (Hydroprogne caspia) breeding in the Baltic Sea

Ornis Fennica ◽  
2022 ◽  
Vol 98 (4) ◽  
pp. 182-141
Author(s):  
Martin Beal ◽  
Patrik Byholm ◽  
Ulrik Lötberg ◽  
Tom J. Evans ◽  
Kozue Shiomi ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Breeding Season ◽  
Site Fidelity ◽  
Population Change ◽  
Habitat Preferences ◽  
Foraging Strategies ◽  
Widespread Species ◽  
Management Actions ◽  
Caspian Terns ◽  
Foraging Site

Habitat preferences and foraging strategies affect population-level space use and are therefore crucial to understanding population change and implementing spatial conservation and management actions. We investigated the breeding season habitat preference and foraging site fidelity of the under-studied and threatened, Baltic Sea population of Caspian Terns (Hydroprogne caspia). Using GPS devices, we tracked 20 adult individuals at two breeding colonies, in Sweden and Finland, from late incubation through chick-rearing. Analyzing foraging movements during this period, we describe trip characteristics for each colony, daily metrics of effort, habitat use, and foraging site fidelity. We found that daily time spent away from the colony increased throughout the season, with colony-level differences in terms of distance travelled per day. In general, terns selected shallow waters between 0–5 meters in depth with certain individuals using inland lakes for foraging. We show, for the first time, that individual Caspian Terns are faithful to foraging sites throughout the breeding season, and that individuals are highly repeatable in their strategies regarding foraging site fidelity. These results fill important knowledge gaps for this at-risk population, and extend our general knowledge of the breeding season foraging ecology of this widespread species.

Distribution and abundance of nesting common and Caspian terns on the North American Great Lakes, 1976 to 1999

2010 ◽  
Vol 36 (1) ◽  
pp. 44-56 ◽  
Author(s):  
Ralph D. Morris ◽  
D. Vaughn Weseloh ◽  
Francesca J. Cuthbert ◽  
Cynthia Pekarik ◽  
Linda R. Wires ◽  
...  
Keyword(s):  
Great Lakes ◽  
North American ◽  
The North ◽  
North American Great Lakes ◽  
Caspian Terns

Use of Breeding and Nonbreeding Encounters to Estimate Survival and Breeding-Site Fidelity of the Piping Plover at the Great Lakes

The Condor ◽  
2010 ◽  
Vol 112 (4) ◽  
pp. 637-643 ◽  
Author(s):  
Olivia E. LeDee ◽  
Todd W. Arnold ◽  
Erin A. Roche ◽  
Francesca J. Cuthbert
Keyword(s):  
Great Lakes ◽  
Site Fidelity ◽  
Breeding Site ◽  
Piping Plover

Vertical and Seasonal Distribution of Chlorophyll a in Lake Michigan

1977 ◽  
Vol 34 (12) ◽  
pp. 2280-2287 ◽  
Author(s):  
Arthur S. Brooks ◽  
Byron G. Torke
Keyword(s):  
Great Lakes ◽  
Chlorophyll A ◽  
Thermal Stratification ◽  
Lake Michigan ◽  
Seasonal Distribution ◽  
Laurentian Great Lakes ◽  
Deep Chlorophyll Maximum ◽  
Phytoplankton Dynamics ◽  
Chain Dynamics ◽  
Offshore Station

Vertical and seasonal distribution of chlorophyll a was observed for 2 yr at an offshore station in Lake Michigan. Chlorophyll a concentrations increased uniformly at all depths during spring reaching 3–4 mg/m3 by late May. Thermal stratification was followed by development of a subthermocline chlorophyll peak between 10 and 30 m that reached 8.5 mg/m3 by late July. The major subthermocline peak collapsed in mid-August but was followed by two lesser peaks at depths of 10 and 30 m. Autumn mixing dispersed these peaks in the mixed layer, increasing the chlorophyll content of the epilimnion at a time when integral chlorophyll levels were declining. At fall overturn chlorophyll concentrations were uniformly distributed at approximately 1 mg/m3, where they remained throughout the winter. The presence of a deep chlorophyll maximum in Lake Michigan adds a new dimension to limnological studies of the Great Lakes. The influence of this peak must be considered in future investigations of food chain dynamics and eutrophication processes in the Great Lakes system. Key words: Laurentian Great Lakes, limnology, chlorophyll a, spatial distribution, phytoplankton dynamics

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