By Samuel M. McGinnis, Doris Alcorn

This well known e-book is the one box advisor to all of California's a hundred thirty freshwater fish species, either local and brought. Revised and up-to-date all through, the advisor now positive factors the one whole choice of colour illustrations of California freshwater fishes on hand at any place. those colour illustrations, coupled with a collection of hugely distinctive black-and-white drawings, supply a short and straightforward procedure for deciding on fish within the box. special typical historical past bills for every species supply a wealth of data, together with the present endangered or threatened prestige of many local species.

  • Includes angling information for every game fish species
  • Features an extended part on cooking freshwater fish

Illustrated via Doris Alcorn

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Extra resources for Field Guide to Freshwater Fishes of California (Revised Edition) (California Natural History Guides, Volume 77)

Example text

These strips are the kidneys. In freshwater fishes they function primarily as water pumps and counteract the continuous inflow of water into the blood at the gill surface. A small urinary bladder can be seen INTRODUCTION 47 dorsal to the gut and ovary or testes at the point where they pass to the outside. The heart is located far anterior in fishes and lies beneath the gill chamber. It is a two-chambered heart, with the large ventricle the most prominent structure. A large venous reservoir, the sinus venosus, collects blood from the large veins and passes it on to the single auricle.

This keen olfactory sense not only aids greatly in feeding but also is the basis for homing in salmon and other species that apparently are imprinted with the subtle odors of their hatching or juvenile rearing site. I was fortunate to be a part of Dr. Arthur D. Hasler’s research team at the University of Wisconsin–Madison, which discovered this olfactory homing ability during field research with White Bass (Morone chrysops) in Lake Mendota. 6 km (1 mile) apart along the north shore of this 16-km-long (10mile-long) lake.

Finally, remove the large triangle of body wall to expose most of the internal organs. With the exception of gravid or egg-laden females, the most prominent organ complex is the stomach and intestine (fig. 6). The stomach is oblong and usually U shaped and is located right behind the gill area. If it is distended with recently ingested food, slit the stomach wall on one side and remove the contents for inspection. Stomach content analysis is one of the most important techniques employed by the fish ecologist, as it can tell much about the habits of a species.

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