scholarly journals Life history of American eel Anguilla rostrata: new insights from otolith microchemistry

2008 ◽  
Vol 1 ◽  
pp. 205-216 ◽  
Author(s):  
BM Jessop ◽  
DK Cairns ◽  
I Thibault ◽  
WN Tzeng
Keyword(s):  
Life History ◽  
Otolith Microchemistry ◽  
Anguilla Rostrata ◽  
American Eel ◽  
History Of

The American Eel (Anguilla rostrata) in Eastern Lake Ontario

1972 ◽  
Vol 29 (5) ◽  
pp. 535-543 ◽  
Author(s):  
Donal A. Hurley
Keyword(s):  
Life History ◽  
Sexual Maturity ◽  
Lake Ontario ◽  
The Other ◽  
Anguilla Rostrata ◽  
Growth Phases ◽  
American Eel ◽  
Ottawa River ◽  
History Of ◽  
Fin Length

The life history of eels in Lake Ontario was studied by measuring, tagging, and releasing about 1500 individuals between 1958 and 1966. The smallest eels captured were from 295 to 318 mm long. Presumably they entered the lake at about age III–IV at lengths of 200–300 mm. Otoliths of eels from the lake showed a range in age between IV and XVIII, while those of smaller eels from the Ottawa River ranged between age II and IX. The length–weight regressions showed two distinct growth phases: one from about 480 mm to 790 mm, the other from about 830 mm to 1080 mm. Growth of the orbital diameter, interorbital distance, and pectoral fin length in relation to total length was not obviously related to sexual maturity. Eels that emigrated from the lake had a greater weight–length ratio than those that remained in the lake for another year. Of 917 tagged eels transplanted within Lake Ontario, 28 were recaptured near and 18 recaptured far from the original capture site. Although the results are inconclusive, there is a suggestion that eels have home territories within the lake.

Estuarine predator—prey interactions in the early life history of two eels (Anguilla rostrata and Conger oceanicus)

2013 ◽  
Vol 97 (8) ◽  
pp. 929-938 ◽  
Author(s):  
Victoria L. Musumeci ◽  
Kenneth W. Able ◽  
Mark C. Sullivan ◽  
Jennifer M. Smith
Keyword(s):  
Life History ◽  
Early Life ◽  
Early Life History ◽  
Anguilla Rostrata ◽  
Predator Prey ◽  
History Of

Life history characteristics and strategies of the American eel, Anguilla rostrata

1999 ◽  
Vol 56 (5) ◽  
pp. 795-802 ◽  
Author(s):  
Kenneth Oliveira
Keyword(s):  
Life History ◽  
Rhode Island ◽  
Life History Traits ◽  
Life History Strategies ◽  
Anguilla Rostrata ◽  
Female Size ◽  
Silver Eel ◽  
Male Size ◽  
American Eel ◽  
Female Age

Several life history hypotheses for the American eel, Anguilla rostrata, were examined using seaward-migrating silver-phase eels collected in the Annaquatucket River, Rhode Island, U.S.A. Female eels were significantly larger and older than males. Female eels also had a significantly higher mean growth rate. The addition of life history data from Annaquatucket River eels to published silver eel data from locations throughout the eels' range shows that female size at migration is positively correlated with latitude (r = 0.56, p = 0.05) but male size is not (r = 0.54, p = 0.17). Female age was not related to latitude (r = 0.57, p = 0.27) but male age showed a positive relationship (r = 0.87, p = 0.05). Growth rates for females and males were inversely related to latitude (r = -0.98, p = 0.02 and r = -0.95, p = 0.05, respectively). Differences between the latitudinal relationships and life history traits of the sexes may be due to differences in life history strategies.

scholarly journals Unravelling the life history of Amazonian fishes through otolith microchemistry

2016 ◽  
Vol 3 (6) ◽  
pp. 160206 ◽  
Author(s):  
Theodore W. Hermann ◽  
Donald J. Stewart ◽  
Karin E. Limburg ◽  
Leandro Castello
Keyword(s):  
Life History ◽  
Effective Means ◽  
Cost Effective ◽  
Otolith Microchemistry ◽  
Simultaneous Increase ◽  
Long Distance ◽  
Environmental Threats ◽  
Nursery Habitats ◽  
History Of ◽  
Migratory Strategies

Amazonian fishes employ diverse migratory strategies, but the details of these behaviours remain poorly studied despite numerous environmental threats and heavy commercial exploitation of many species. Otolith microchemistry offers a practical, cost-effective means of studying fish life history in such a system. This study employed a multi-method, multi-elemental approach to elucidate the migrations of five Amazonian fishes: two ‘sedentary’ species ( Arapaima sp. and Plagioscion squamosissimus ), one ‘floodplain migrant’ ( Prochilodus nigricans ) and two long-distance migratory catfishes ( Brachyplatystoma rousseauxii and B. filamentosum ). The Sr : Ca and Zn : Ca patterns in Arapaima were consistent with its previously observed sedentary life history, whereas Sr : Ca and Mn : Ca indicated that Plagioscion may migrate among multiple, chemically distinct environments during different life-history stages. Mn : Ca was found to be potentially useful as a marker for identifying Prochilodus 's transition from its nursery habitats into black water. Sr : Ca and Ba : Ca suggested that B. rousseauxii resided in the Amazon estuary for the first 1.5–2 years of life, shown by the simultaneous increase/decrease of otolith Sr : Ca/Ba : Ca, respectively. Our results further suggested that B. filamentosum did not enter the estuary during its life history. These results introduce what should be a productive line of research desperately needed to better understand the migrations of these unique and imperilled fishes.

Connectivity in the early life history of sandeel inferred from otolith microchemistry

2017 ◽  
Vol 119 ◽  
pp. 8-16 ◽  
Author(s):  
Fiona M. Gibb ◽  
Thomas Régnier ◽  
Kirsty Donald ◽  
Peter J. Wright
Keyword(s):  
Life History ◽  
Early Life ◽  
Early Life History ◽  
Otolith Microchemistry ◽  
History Of

Life history of anadromous burbot (Lota lota, Linneaus) in the brackish Baltic Sea inferred from otolith microchemistry

2013 ◽  
Vol 23 (2) ◽  
pp. 141-148 ◽  
Author(s):  
Mehis Rohtla ◽  
Markus Vetemaa ◽  
Imre Taal ◽  
Roland Svirgsden ◽  
Kristjan Urtson ◽  
...  
Keyword(s):  
Life History ◽  
Baltic Sea ◽  
Otolith Microchemistry ◽  
Lota Lota ◽  
History Of

Geographic effects on American eel (Anguilla rostrata) life history characteristics and strategies

2010 ◽  
Vol 67 (2) ◽  
pp. 326-346 ◽  
Author(s):  
B. M. Jessop
Keyword(s):  
Life History ◽  
Growth Rates ◽  
Atlantic Coast ◽  
Life History Strategies ◽  
Anguilla Rostrata ◽  
Annual Growth Rate ◽  
Degree Days ◽  
Silver Eel ◽  
American Eel ◽  
Spawning Site

Latitudinal variability in length and age at maturity and annual growth rate for the American eel ( Anguilla rostrata ) along the Atlantic coast of North America was examined with respect to life history strategies and theory. Maturing (silver phase) female lengths and ages increased with increasing latitude (and distance) from the Sargasso Sea spawning site, as did male ages but not lengths. Growth rates for females (and males) declined with increasing latitude south of 44°N latitude, approximately the entrance to the Cabot Strait, but were constant or increased within the Gulf of St. Lawrence and St. Lawrence River, depending on the analysis method. The growing season and the number of degree-days ≥ 10 °C declined with increasing latitude. Female growth rates adjusted for the number of degree-days were approximately constant south of 44°N but increased further north, suggesting countergradient variation in growth. The temperature–size rule (increase in body size at lower temperatures) evidently applies to American eel females, but not males. No current life history model provides a satisfactory explanatory mechanism for the temperature–size rule and for anguillid life history strategies. A genetic link is proposed between increasing age (length) at elver and silver eel stages with increasing distance from the spawning area.

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