New Zealand Journal of Marine and Freshwater Research abstracts

---

DDT IN TROUT AND ITS POSSIBLE EFFECT ON REPRODUCTIVE POTENTIAL

C. L. Hopkins

Fisheries Research Division, Marine Department, Wellington

S. R. B. SoLLy
A. R. Ritchie

Wallaceville Animal Research Centre, Department of Agriculture, Wellington

Abstract Eggs of rainbow trout (Salmo gairdneri Richardson) from five different lakes in North Island, New Zealand, were reared to discover whether they showed significant differences in survival which could be linked with DDT levels in the tissue. The muscle and gonads of pre-breeding season fish and the parent females were assayed for DDT, as were the whole fry at the end of rearing. The highest DDT levels were found in fish from Lake Rerewhakaaitu, and eggs from these fish showed the least viability. Mortality was relatively low among eggs from fish out of the other lakes. Thus, DDT may possibly contribute to the high mortality found in eggs from Lake Rerewhakaaitu fish.

N.Z. Jl mar. Freshwat. Res. 3: 220-9
(Received for publication 25 October 1968)

PDF file of entire paper: medium quality (490K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page