摘要:

Data on anglers' catches, the growth and migration of stocked trout, and the efficiency of fall and spring plantings were obtained by means of a creel census in Spring Creek, Pennsylvania, during 1939. Of 2,130 tagged trout planted, 50.8 per cent were recovered by anglers. Due to heavy fishing pressure, more than 40 per cent of all tagged trout taken during the entire season were removed on the first day. A high first-day kill (76 per cent of the total recoveries) of brook trout was noted. The quality of fishing declined rapidly during the early season. Fishing for brook trout was good for only a few days, brown trout fishing was fair for about a month, while rainbow trout fishing lasted slightly longer. Catches of tagged trout after 6 weeks were negligible. Only 10 trout were recovered during 1940 and 1 during 1941. Six of these fish were brown trout and 5 were rainbow trout. There was no evidence that any brook trout survived from one fishing season to the next.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[158:RFPOTT]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

At least 39 species and subspecies of fishes have been introduced into the waters of Nevada since 1873. Of these, 24 kinds are now known to occur in the state. A thorough survey of the exotic fishes has not been made, but specimens or records of introduced species have been kept in the course of rather extensive collecting of the native fish fauna from 1934 to 1943. Consequently it is believed that the number of introduced species herein enumerated approaches a complete tabulation. Some additions among the sunfishes and catfishes may be expected.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[173:TIFONW]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

Pre-impoundment bottom-fauna data from five stations are presented for the Cherokee Reservoir area, Tennessee. Production was found to be much lower in the deep-water pools than in the shallow-water riffle areas. In the riffle areas the two taxonomic groups, Trichoptera and Diptera, made up 93.3, 81.4, and 92.8 per cent of the total population while the Trichoptera and Sialidae comprised 69.3, 80.0, and 88.4 per cent of the total volume at three different stations. The gradual increase in volume over a period of 3 months at the most productive station was concluded to be due almost entirely to the increment in numbers of Trichoptera rather than to the growth of individual organisms.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[194:APBSOC]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

A portion of the data accumulated in a 4-year study of the trout of Crystal Creek, New York State, is reported. An annual population inventory of the same 13 sample sections of the stream each September for 4 years provided information on survival, density of fish, growth, movement, and other factors. The percentage survival of the young brown trout of the year (age-group 0) in later years was found to be as follows: Second year (age-group I), 24.1; third year (age-group II), 11.0; fourth year (age-group III), 5.49; fifth year (age-group IV), 1.25; sixth year (age-group V), 0.48. The trout were subject to angling, which accounted for about 15 per cent of the yearly losses of the legal-sized fish. A considerable mortality of the larger-sized trout, for which the cause could not be determined, was observed each year during July.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[209:SPDGAM]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

During the winter of 1940–41, 1,128 bluegills and 211 yellow perch were collected from the rather productive Cedar Lake, Washtenaw County, Michigan. Analyses were made of the contents of the stomachs of these fish.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[231:WFHOBL]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

Stomach analyses of 947 yellow pikeperch fingerlings taken from rearing ponds show that fry begin feeding on rotifers and nauplii, and that as the fish increase in size Entomostraca, insects, and fish successively become important items in the diet. Yield and management data from 185 ponds suggest that the best means of controlling cannibalism and increasing yields are: (1) fertilization to promote an early and sustained crustacean crop; (2) use of forage fish as a food and “buffer population”; and (3) harvesting at a weight of 50 to 80 fingerlings to the pound. The average yield per acre of yellow pikeperch from ponds in Minnesota for the period 1940–1943 was 48.4 pounds and 2,111 fingerlings; this output was lower than that of other game-fish ponds. The average yields in pounds per acre attained in yellow pikeperch ponds under different management methods were: neither forage nor fertilizer, 7.5; fertilizer only, 41.6; sucker fry but no fertilizer, 44.0; and minnows but no fertilizer, 95.8. Few ponds succeeded that had a game-fish or minnow population when fry were stocked. Data from 10 experimental ponds demonstrate that fertilization is usually necessary to produce an early crustacean crop and that the most effective types of fertilizer are commercial fertilizer and sheep manure. Cottonseed meal and superphosphate were found to be relatively ineffective. Water analyses on 10 experimental ponds and 71 rearing ponds suggest that a greater utilization of the natural fertility can be had in most ponds through more intensive management.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[243:FIPOYP]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

In ponds treated with a limited amount of fertilizer to produce optimum survival, the production of fingerling largemouth black bass, Huro salmoides, (Lacépède) has been increased by the addition of lime and/or colloidal phosphate to cottonseed meal fertilizer, with the greatest production where lime and colloidal phosphate were used together.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[262:TRBTPO]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

An analysis is made of the commonly used practices in the management of warm-water fish. These practices consist chiefly of legal restrictions, such as closed seasons and creel and size limits, and the restocking of waters from hatcheries or with fish obtained in so-called rescue operations. The value of most of such practices seems to be nil when considered in terms of satisfaction to the angler or increased food production. Some supporting evidence is presented. Suggestions for increasing fish production are: The harvesting of fish crops in proportion to species and sizes available; the rejuvenation of senescent lakes by irrigation; the impoundment of new water areas with provision for managing and harvesting the whole crop; and the utilization of abandoned reclamation projects in a similar manner. The judicious use of irrigation and drainage for the purpose of oxidizing pond bottoms, and the fluctuation of water-levels for reducing shore vegetation and thinning out overly dense populations, are also proposed.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[274:ACAOPI]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[284:APKTTS]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor

摘要:

The records of the tagging of 462,000 marine and anadromous fishes from 1873 to 1933 are summarized by species and locality. An effort has been made to clear up the confusion in the names and descriptions of tags by classifying all the tags actually used into 18 categories which are defined. An illustration is given of one or more tags in each category. The origin, use, and development is discussed for each tag, accompanied by an accurate description of size, shape and material. How to plan a tagging experiment so as to yield the type of information desired is discussed at length. Methods are given for recovering tags from the liberated fish by advertising, canvassing, direct observation, payment of rewards and mechanical sorters. The need for the use of proper field methods is stressed in experiments designed to show the relative efficiency of different tags. Drawing to a large extent on personal experience the actual field technique employed is discussed at length. A bibliography of 232 references contains all the important papers on tagging to within recent years and provides the basis for the tabulations of numbers and species of fish tagged, and gives the original description of each tag.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1943)73[320:HTMF]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1945

数据来源: Taylor