scholarly journals Daily deposition of growth increments in sagittae and lapilli of laboratory-reared larval northern pike (Esox lucius)

2018 ◽  
Vol 116 (3-4) ◽  
pp. 302-309 ◽  
Author(s):  
Dariusz P. Fey ◽  
Adam M. Lejk ◽  
Martyna Greszkiewicz
1972 ◽  
Vol 29 (5) ◽  
pp. 469-476 ◽  
Author(s):  
Gordon D. Koshinsky

In a 4-year study of northern pike (Esox lucius) at Lac la Ronge, Sask., barb-anchored spaghetti dart tags (when applied with special needles and disinfectant) were retained longer than monofilament-attached preopercular disc tags. Losses after 2 years were 13 and 92%, respectively. Tagging mortality tended to be higher among dart-tagged individuals, but was only 12% after 2 years. Condition tended to be depressed by both tags and, among females, more so by the preopercular discs. Growth increments tended to be smaller for disc-tagged than for dart-tagged individuals of the same sex. Disc-tagged pike also dispersed more widely and were more vulnerable to angling. It is suggested that a brightly colored tag attached to the head of a predatory species, such as pike, interferes with feeding, perhaps by startling prey; such interference would explain all of the comparative tagging effects observed.


2021 ◽  
Vol 83 (3) ◽  
Author(s):  
Mehdi Moslemi-Aqdam ◽  
George Low ◽  
Mike Low ◽  
Brian A. Branfireun ◽  
Heidi K. Swanson

Chemosphere ◽  
2012 ◽  
Vol 86 (5) ◽  
pp. 439-445 ◽  
Author(s):  
Staffan Åkerblom ◽  
Mats Nilsson ◽  
Jun Yu ◽  
Bo Ranneby ◽  
Kjell Johansson

1988 ◽  
Vol 45 (7) ◽  
pp. 1154-1162 ◽  
Author(s):  
Paul Andersson ◽  
Hans Borg

We studied the cadmium concentrations in water, sediment, suspended particles, a free-swimming insect larva (Chaoborus), a sediment-bound insect larva (Chironomus), and liver of northern pike (Esox lucius) before and after liming operations in Lake Långsjön, Sweden. In accordance with the higher pH levels obtained in the lake water after the limings, cadmium concentration decreased in the water but increased in the sediment. Cadmium concentration in fish liver and Chironomus decreased after the limings whereas the concentration in Chaoborus larvae increased after the first liming. Possible mechanisms are discussed.


Oecologia ◽  
1999 ◽  
Vol 120 (3) ◽  
pp. 386-396 ◽  
Author(s):  
Catherine P. Beaudoin ◽  
William M. Tonn ◽  
Ellie E. Prepas ◽  
Leonard I. Wassenaar

2018 ◽  
Vol 93 (6) ◽  
pp. 1107-1112 ◽  
Author(s):  
Nicolas Guillerault ◽  
Géraldine Loot ◽  
Simon Blanchet ◽  
Frederic Santoul

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