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

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.

Short sea migration and precocious maturation in reared Atlantic salmon post-smolts in the northern Baltic Sea

2017 ◽  
Vol 75 (3) ◽  
pp. 1063-1070 ◽  
Author(s):  
Panu Orell ◽  
Jaakko Erkinaro ◽  
Mikko Kiljunen ◽  
Jyrki Torniainen ◽  
Tapio Sutela ◽  
...  
Keyword(s):  
Life History ◽  
Atlantic Salmon ◽  
Baltic Sea ◽  
Isotope Analysis ◽  
History Of ◽  
The Baltic ◽  
Bothnian Bay ◽  
Almost All ◽  
Induced Changes ◽  
Sea Area

Abstract Atlantic salmon (Salmo salar L.) display significant variation in life history traits, including migration patterns and age at maturity. Hatchery rearing has been shown to affect the life history, and rearing-induced changes may include unfavourable consequences, e.g. shortened sea migration period and smaller size at maturity. We report on a new phenomenon of life history of reared Atlantic salmon in the Baltic Sea area: small-sized salmon returning to freshwater only a few months after release as smolts. These “one-sea-summer (1SS)” salmon were ca. 35 cm in length and weighed ca. 400 g, being clearly larger than smolts, but substantially smaller than one-sea-winter (1SW) salmon from the same cohorts. Almost all 1SS salmon were mature males and, at release, had been longer than the overall mean. Stable isotope analysis suggested that the 1SS salmon had been feeding in different sea areas than 1SW and multi-sea-winter salmon, likely in nearby Bothnian Bay, which is typically not a salmon feeding area. If an increasing proportion of the released salmon are not undertaking a normal marine migration (≥1SW) and are returning to estuaries and rivers as 1SS fish, the success and profitability of the reared salmon releases will decline even more than the reduced post-smolt survival is suggesting. We suggest that alternative rearing practices (e.g. enriched rearing environments and advanced diets) should be considered in hatchery production for shaping the reared smolts towards a closer resemblance to wild smolts.

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

STUDIES ON CESTODES OF THE GENUS TRIAENOPHORUS FROM FISH OF LESSER SLAVE LAKE, ALBERTA: III. NOTES ON TRIAENOPHORUS NODULOSUS (PALLAS) IN THE SECOND INTERMEDIATE HOST

1945 ◽  
Vol 23d (1) ◽  
pp. 1-5 ◽  
Author(s):  
Richard B. Miller
Keyword(s):  
Life History ◽  
Intermediate Host ◽  
Cyst Wall ◽  
Liver Tissue ◽  
Lota Lota ◽  
History Of ◽  
Second Intermediate Host ◽  
Triaenophorus Nodulosus

The plerocercoids of T. nodulosus were found in their earliest stages in the livers of burbot fry (Lota lota maculosa) in early July. At this time the worms occur scattered throughout the liver tissue, not enclosed in cysts. The anlagen of the scolex hooks are present.Later in July the cyst wall has developed and the plerocercoids are provided with a scolex identical with the adult structure. The cysts are small and compact and the contained worms strongly coiled in contrast to their earlier, diffuse state.During the second summer the plerocercoids begin to degenerate, the process proceeding from the posterior end forward. No burbot older than yearlings were found to contain cysts.A brief summary of the life history of T. nodulosus is given.

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
Sign in / Sign up

Export Citation Format

Share Document