Wyniki wyszukiwania - BazTech

Ograniczanie wyników

3 Oceanological Studies

3 2002

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: Port-Said

Sortuj według:

Ogranicz wyniki do:

Species composition and size structure of beach seine by-catches in Port-Said fishing harbour, Egypt

El-Mor M., El-Etreby S., Sapota M.R.

Oceanological Studies

2002

Vol. 31, No. 3-4

31-43

The trash catch of the Egyptian Mediterranean small beach seine operating in Port-Said fishing harbour at the entrance of the Suez Canal during the period from January to December 1997 was analyzed. It amounted about 3-5 kg per haul composed of three categories: juveniles of commercially important species (76.6%), low-valued small size fish species (11.2%) and 12.2% of non-edible "trash" species. The amount of trash catch constituted about 20-25% of the total landing of beach seine. It was classified into 42 species representing 24 families. Among these, 17 species are known to be of Red Sea origin. Three species Siganus rivulatus, (recruitment in October), Terapon puta (recruitment in August and September) and Pomadasys incisus (recruitment in January and February) dominated the assemblage of 42 species and contributed 53.8% of all sampled fishes.

Biological studies on juvenile fish of Siganus rivulatus (Forsskal 1775) in Port-Said fishing harbour, Egypt

El-Mor M., El-Etreby S., Sapota M.R.

Oceanological Studies

2002

Vol. 31, No. 3-4

17-30

A total of 999 specimens of Siganus rivulatus were collected from trash catches of small beach seine operating in the Port Said fishing harbour at the entrance of the Suez Canal during the period from January to December 1997. The species constituted 20.1% of the trash catch and about 4 - 5% of the total catch of the gear. The juveniles of S. rivulatus could stay at the nursery grounds from October till April, and be recruited from October till December. The length-weight relationships, as well as the condition factor of the juvenile fish, were studied. The feeding activities were quite high in winter months. From May to September, juveniles of S. rivulatus appear to be exclusively deposit feeders in most months, feeding mainly on algae and molluscs.

Biological studies on juvenile fish of Sardinella aurita (Valenciennes 1847) off the Port-Said coast (Mediterranean Sea, Egypt)

El-Mor M., El-Etreby S., Sapota G.

Oceanological Studies

2002

Vol. 31, No. 3-4

3-16

A total of 861 specimens of Sardinella aurita were collected from month-ly trash catches from a trawling net operating on the Port Said coast on the Mediterranean Sea from January to December 1997. The species constituted 17.9% of the trash catch and about 3% of the total catch of the gear. The juveniles of S. aurita stayed at the nursery grounds from September till March, and recruited from September till December. The length-weight relationships as well as the condition factor of the juvenile fish were studied. The highest values of the condition factor were recorded in autumn. The feeding activities were quite high during the early winter and autumn. The juveniles of S. aurita are likely to feed in the upper water level (planktonivorous).