Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

2 Oceanological and Hydrobiological Studies

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: European anchovy

Sortuj według:

Ogranicz wyniki do:

Nematodes found in the European anchovy (Engraulis encrasicolus), a rare visitor to the Baltic Sea [commun.]

100%

Kulikowski M. , Rolbiecki L. , Skóra K. , Rokicki J.

tom Vol. 41, No. 3

99-102

The European anchovy, Engraulis encrasicolus (Linnaeus, 1758), enters the Baltic Sea only occasionally. Little is known about the parasites that inhabit this fish in the northern part of its natural range (north-eastern Atlantic). This study is based on 32 anchovies sampled in autumn 2006 from a substantial bycatch accompanying sprat in the Gulf of Gdańsk (southern Baltic Sea). The fish were examined using standard parasitological procedures, and yielded 10 L3 larvae of the nematode Hysterothylacium aduncum (Rudolphi, 1802). The prevalence and the intensity (mean and range) were 21.9%, 1.4, and 1–4, respectively.

Reproductive biology of the European anchovy Engraulis encrasicolus (Linnaeus, 1758) in the Turkish Aegean Sea

86%

Taylan B. , Bayhan B.

tom Vol. 53, No. 1

7--15

The present study investigated the reproductive biology of European anchovies obtained seasonally from fishermen in İzmir Bay (Aegean Sea). The total length range of the investigated individuals was 9.0 – 15.7 cm. Of the 750 samples in which sex was determined, 34% were males, and 66% were females, resulting in a female-to-male ratio of 1.91:1. The first maturation length was determined to be 10.47 cm for females and 9.95 cm for males. Based on the total values of the gonadosomatic index, it was concluded that the reproductive period of the species falls in the summer season. The batch fecundity of the species ranged from 2.123 to 6.951 oocytes, and the fecundity–length relationship was expressed as F = 1134.4TL – 10034 (R2 = 0.84). Histological examination of the female ovaries revealed the presence of oocytes at different stages of development, indicating multiple spawning during the reproductive season.