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Investigation of containerization for transportation of live blue crabs, Callinectes sapidus 活蓝蟹(Callinectes sapidus)集装箱运输调查
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350588
W. S. Otwell, N. B. Webb
{"title":"Investigation of containerization for transportation of live blue crabs, Callinectes sapidus","authors":"W. S. Otwell, N. B. Webb","doi":"10.2307/1350588","DOIUrl":"https://doi.org/10.2307/1350588","url":null,"abstract":"Simulated over-the-road transportation studies were designed to determine the survival rate of blue crabs in various types of containers and at three storage temperatures. Survival rates were evaluated for seven container designs at test temperatures 5, 10, 20°C during a 96-hr storage period. The best survival rate for blue crabs out of water was at 10°C in open baskets with moist burlap packaging (80–95% relative humidity). Mean mortalities under these conditions were 4.2% after 24 hr, 5.0% after 36 hr, and 16.7% after 48 hr storage. Tests on the frequency of handling the crabs indicated that these mortalities were probably high. The results of this study indicated that procedures which encompass an open type container with a method to maintain high humidity, such as moist burlap, and temperature control (approx. 10°C) will substantially improve the survival of blue crabs. Differential survival by sex indicate that the geographical distribution of the crabs deserves further study.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124819096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Effects of environmental factors on the distribution and morphology of Victorella pavida (Ectoprocta) in Lake Pontchartrain, Louisiana, and vicinity 环境因子对路易斯安那州庞恰特兰湖及其邻近地区pavida分布和形态的影响
Chesapeake Science Pub Date : 1977-12-01 DOI: 10.2307/1350589
M. A. Poirrier, M. M. Mulino
{"title":"Effects of environmental factors on the distribution and morphology of Victorella pavida (Ectoprocta) in Lake Pontchartrain, Louisiana, and vicinity","authors":"M. A. Poirrier, M. M. Mulino","doi":"10.2307/1350589","DOIUrl":"https://doi.org/10.2307/1350589","url":null,"abstract":"Victorella pavida was studied during 1971, 1973, 1974 and 1975. Its distribution along a decreasing salinity gradient was investigated and its mean low-salinity limit was found to nearly correspond to the boundary between the oligohaline and limnetic estuarine salinity zones. Because it was abundant and uniformly distributed in low salinities, and was absent in the limnetic range, it could be used as an indicator species to determine the maximum extent of brackish-water intrusion in estuarie. In most collections there was a relationship between zooid branching and salinity; however, this relationship did not appear to be related to salinityper se but to the effect of salinity on growth rate and interspecific competition, which in turn affected colony morphology. It occurred in waters which had a wide range of physiocochemical conditions and was the predominant epifaunal species in an outfall canal which received sewage and storm-water discharge from New Orleans. Because of its dominance of the epifauna in areas with poor water quality it appears to be an important species to consider when species association and abundance are used to assess environmental quality.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"39 1-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131991006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Composition and seasonality of zooplankton of North Inlet, South Carolina 南卡罗莱纳北湾浮游动物的组成和季节性
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350801
D. Lonsdale, B. C. Coull
{"title":"Composition and seasonality of zooplankton of North Inlet, South Carolina","authors":"D. Lonsdale, B. C. Coull","doi":"10.2307/1350801","DOIUrl":"https://doi.org/10.2307/1350801","url":null,"abstract":"The zooplankton of the North Inlet estuary near Georgetown, South Carolina, was collected bi-weekly from January 1974 to August 1975 (20 months) at four stations. Zooplankton numbers ranged from 377 to 84,414 m−3 ((bar X)=9257 m−3) and biomass from 640 to 140,169 μg dry weight m−3 ((bar X)=16,178 μg dry weight m−3). The major peak in the density of zooplankton occurred between April and July both years.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122711874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 69
Thermal effects of power plant entrainment on survival of larval fishes: a laboratory assessment 发电厂夹带对幼鱼存活的热效应:实验室评估
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350803
J. Schubel, C. F. Smith, T. Koo
{"title":"Thermal effects of power plant entrainment on survival of larval fishes: a laboratory assessment","authors":"J. Schubel, C. F. Smith, T. Koo","doi":"10.2307/1350803","DOIUrl":"https://doi.org/10.2307/1350803","url":null,"abstract":"Blueback herring (Alosa aestivalis), American shad (Alosa sapidissima), and striped bass (Morone saxatilis) larvae from the Chesapeake Bay region were subjected in the laboratory to time-excess temperature histories typical of those experienced by organisms entrained by power plants with a variety of design and operating criteria. The maximum excess temperature ranged from 7° to 20°C above the base temperature (the average surface water temperature on the spawning grounds); the time of exposure to a maximum excess temperature from 4 to 60 minutes; and the period of cooling to the final temperature from 60 to 300 minutes. An excess temperature of 20°C resulted in virtually total mortality of larvae of all three species. Striped bass larvae were the most tolerant of the, three species and could withstand excess temperatures of up to 10°C with no significant increase in mortality. The response patterns of the other two species were more complicated.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"283 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131536070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Some aspects of the biology of the harpacticoid copepod, Scottolana canadensis (Willey), maintained in laboratory culture 羽足类桡足动物Scottolana canadensis (Willey)在实验室培养中保持生物学的某些方面
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350798
R. Harris
{"title":"Some aspects of the biology of the harpacticoid copepod, Scottolana canadensis (Willey), maintained in laboratory culture","authors":"R. Harris","doi":"10.2307/1350798","DOIUrl":"https://doi.org/10.2307/1350798","url":null,"abstract":"The epibenthic harpacticoidScottolana canadenis can be maintained over multiple generations on a diet of the flagellateIsochrysis galbana and the diatomThalassiosira pseudonana at 20 and 25°C. Adult females lived on average for 77.8 days during which the mean number of eggs produced was 406.8. The maximum number of eggs produced by a single female was 817. Both brood size and rate of egg production increase with increasing quantity of food available until a level is reached above which there is no further increase in fecundity.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"181 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133102810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 49
Cobia (Rachycentron canadum) tagging within Chesapeake Bay and updating of growth equations 切萨皮克湾军曹鱼(Rachycentron canadum)的标记及生长方程的更新
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350806
C. E. Richards
{"title":"Cobia (Rachycentron canadum) tagging within Chesapeake Bay and updating of growth equations","authors":"C. E. Richards","doi":"10.2307/1350806","DOIUrl":"https://doi.org/10.2307/1350806","url":null,"abstract":"Early summer concentrations discovered by sportfishermen in Chesapeake Bay allowed tagging and release of twenty fish. Six returns were received from sport catches up to five years after release (1,855 days). Sport fishing mortality was 0.30 ±0.21 with P=95%.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"389 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132306304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Trace metals in liver from bluefish, tautog and tilefish in relation to body length 蓝鱼、长臂鱼和方头鱼肝脏中微量金属与体长的关系
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350808
Harold C. Mears, R. Eisler
{"title":"Trace metals in liver from bluefish, tautog and tilefish in relation to body length","authors":"Harold C. Mears, R. Eisler","doi":"10.2307/1350808","DOIUrl":"https://doi.org/10.2307/1350808","url":null,"abstract":"Livers from bluefish, tilefish and tautog collected during the summer of 1971 off the New Jersey coast were analyzed for Cd, Cr, Cu, Fe, Mn, Ni, and Zn by atomic absorption spectrophotometry. Liver ash from male and female tautog contained decreasing concentrations of Ni with increasing body length. Smaller males also contained greater levels of Cr and Cu in liver than larger tautogs.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122874704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Macrobenthos of the tidal Delaware River between Trenton and Burlington, New Jersey 新泽西州特伦顿和伯灵顿之间的特拉华河潮汐中的大型底栖动物
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350799
S. Crumb
{"title":"Macrobenthos of the tidal Delaware River between Trenton and Burlington, New Jersey","authors":"S. Crumb","doi":"10.2307/1350799","DOIUrl":"https://doi.org/10.2307/1350799","url":null,"abstract":"A study of the macrobenthos of the tidal Delaware River between Burlington and Trenton, New Jersey, included measurements of density and biomass for common species. Tubificidae (Limnodrilus) were dominant, comprising over 90% of all organisms taken in the 3-year study period. Density seemed to be a function of water temperature (20–25 C, optimal) and was greatest in late spring and early summer. Other common species were larvalProcladius culiciformis (Chironomidae) andCorbicula manilensis (asiatic clam).Procladius was most abundant in late summer just prior to and during emergence. The asiatic clam was in the process of colonizing the area and growth data have been calculated. Potential relationships between numbers and standing crop of the common organisms with sediment type, and seasonal changes were explored.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116270192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
The black-tailed jackrabbit,Lepus californicus, in Maryland 马里兰州的黑尾长耳大野兔(Lepus californicus)
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350809
J. A. Chapman, J. Sandt
{"title":"The black-tailed jackrabbit,Lepus californicus, in Maryland","authors":"J. A. Chapman, J. Sandt","doi":"10.2307/1350809","DOIUrl":"https://doi.org/10.2307/1350809","url":null,"abstract":"","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114255214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effects of sampling gear on the survival of striped bass ichthyoplankton 取样装置对条纹鲈鱼生存的影响
Chesapeake Science Pub Date : 1977-09-01 DOI: 10.2307/1350807
J. O'Connor, S. Schaffer
{"title":"The effects of sampling gear on the survival of striped bass ichthyoplankton","authors":"J. O'Connor, S. Schaffer","doi":"10.2307/1350807","DOIUrl":"https://doi.org/10.2307/1350807","url":null,"abstract":"Hatchery spawned and reared eggs, yolk-sac larvae and larvae from Hudson River striped bass (Morone saxatilis) were released into ichthyoplankton nets in an experimental flume at velocities of 0.5, 1.5 and 3.0 fps. Percent survival was determined immediately after exposure and, for 14-day-old larvae, after 72 hr. to assess latent mortality effects. Immediate and latent mortality was found to be velocity-dependent. Yolk-sac larvae were most sensitive to velocity during net capture, followed by post-yolk-sac larvae and eggs, in decreasing order of sensitivity. Attempts to determine survival of striped bass ichthyoplankton using net-captured organisms at steam electric stations may be affected profoundly by differences in water velocity at intakes and discharges.","PeriodicalId":106819,"journal":{"name":"Chesapeake Science","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124085160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
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