EJPAU 2009. Bonisławska M. EFFECTS OF SALINITY ON THE DURATION AND COURSE OF EMBRYOGENESIS IN SEA TROUT (<I>SALMO TRUTTA </I>L.)

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2009
Volume 12
Issue 4

Topic:

Fisheries

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Bonisławska M. 2009. EFFECTS OF SALINITY ON THE DURATION AND COURSE OF EMBRYOGENESIS IN SEA TROUT (SALMO TRUTTA L.), EJPAU 12(4), #07.
Available Online: http://www.ejpau.media.pl/volume12/issue4/abs-07.html

EFFECTS OF SALINITY ON THE DURATION AND COURSE OF EMBRYOGENESIS IN SEA TROUT (SALMO TRUTTA L.)

Małgorzata Bonisławska
Department of Aquatic Sozology, West Pomeranian University of Technology in Szczecin, Szczecin, Poland

ABSTRACT

Effects of salinity (0.5–0.7; 1; 2; 3‰) on the duration
and course of embryogenesis in sea trout were studied using a system consisting
of a microscope coupled with a digital camera, computer screen, and video recorder.
The observation system used made it possible to analyze the videotaped images
and frames, and to measure the eggs (diameters) and newly hatched larvae (body
length and yolk sac volume). The control embryos took the longest to hatch. Depending
on the water salinity, the newly hatched larvae showed significant differences:
the longest and largest larvae hatched from the control eggs and those incubated
at the lowest salinity. The larvae incubated at 2‰ showed the highest percentage
of malformed individuals. The salinity of 3‰ proved too high for the sea trout
embryos; they failed to hatch and died while still in the egg. Low salinity (up
to 2‰) did not affect the duration and course of embryogenesis in the sea trout.

Key words: fertilization, embryonic, development, salinity, sea trout (Salmo trutta L.).

Małgorzata Bonisławska
Department of Aquatic Sozology, West Pomeranian University of Technology in Szczecin, Szczecin, Poland
Kazimierza Królewicza 4B
71-550 Szczecin
Poland
email: Malgorzata.Bonislawska@zut.edu.pl

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