Freshwater Invertebrate Biology最新文献

{"title":"Food Habits and Dietary Overlap among Six Stream Collector Species","authors":"R. Short","doi":"10.2307/1467087","DOIUrl":"https://doi.org/10.2307/1467087","url":null,"abstract":"Food habits were determined monthly over one year for six species of invertebrate collectors in a Colorado trout stream. Detritus formed the bulk of the diet for each species with an algal contribution that was usually < 10%. The vast majority of particles in the foreguts were < 75 μm in size and coincided with the most abundant size class of detritus in the stream. Dietary overlap as measured with Horn's Coefficient of Dietary Overlap was usually > 0.90 for type of food (algae vs. detritus) and particle size. This would indicate that no significant partitioning of food resources occurred among these six species of stream collectors.","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114449775","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}

{"title":"Drift of Ephemeroptera and Plecoptera in Two Colorado Rivers","authors":"K. Stewart, S. W. Szczytko","doi":"10.2307/1467086","DOIUrl":"https://doi.org/10.2307/1467086","url":null,"abstract":"Mayfly and stonefly drift were studied during the ice-free season in two Colorado mountain rivers. Eleven and 12 species of mayflies and stoneflies, respectively, were collected in 416 samples, taken at eight daily time periods. Drift rates ranged 1-499/100 m3. Baetis bicaudatus and Baetis tricaudatus were the most prolific mayfly drifters in all months in both rivers. B. tricaudatus exhibited a bigeminus pattern in the Dolores River in August and September, 1975, with high August drift rates of 499/100 m3 and 158/100 m3, respectively, during post-sunset and pre-sunrise hours. Baetis bicaudatus also exhibited a bigeminus pattern in August and September in both rivers. Larger Baetis nymphs drifted more at night than in the three daytime periods in May, June in the Dolores River, and larger B. bicaudatus drifted at night in September. These times correspond with months representing larger nymphal sizes and seem to support the hypothesis that larger nymphs drift predominantly at night, after reaching some minimal size threshold that might increase their risk as prey for sight-feeding fishes. Ephemerella inermis drifted at densities of 6-9/1003 in May and July, respectively, in the Dolores River, and Rhithrogena sp., Ephemerella inermis and Cinygmula sp. drifted at peak rates of 11, 9 and 8/100 m3, respectively in May, June and July in the Dolores River. All other mayfly species drifted infrequently and/or at low rates of less than 2/100 m3 in both rivers. Stoneflies, except Chloroperlidae, drifted at low densities of less than 2/100 m3 in both rivers. For most species, these low numbers corresponded with low relative benthic abundance, making it difficult to ascertain propensity to drift. The relatively high benthic abundance of Claassenia sabulosa and Hesperoperla pacifica, coupled with their near absence in the drift, would suggest a low behavioral drift tendency, consistent with most drift studies that have included Plecoptera. Chloroperlid nymphs representing the genera Suwallia, Sweltza and Triznaka, drifted in the Gunnison River at the relatively high peak densities of 16-26/100m3, with a marked nighttime periodicity. Their peaks represented large, pre-emergent sized nymphs, and occurred in May, June and August, 1975, corresponding with emergence of various species throughout the summer.","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125220096","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}

{"title":"Back Matter","authors":"","doi":"10.1086/fresinvebiol.2.3.1467092","DOIUrl":"https://doi.org/10.1086/fresinvebiol.2.3.1467092","url":null,"abstract":"","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130408555","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}

{"title":"An Inexpensive and Simple Elutriation Device for Separation of Invertebrates from Sand and Gravel","authors":"R. Whitman, J. M. Inglis, W. J. Clark, R. W. Clary","doi":"10.2307/1467091","DOIUrl":"https://doi.org/10.2307/1467091","url":null,"abstract":"A new device for separation of stream invertebrates is described and its performance evaluated. The \"cone elutriator\" consists of a Schleicher and Schuell filtering apparatus attached to a standard Imhoff cone. Excellent recovery of organisms, ranging in length from 0.7 to 26 mm, was observed. Mean recovery from sand (excluding molluscs) was 93% and 98% from gravel. It appears that cross-sectional density is more important than the size of an organism in elutriation yield. Except for molluscs, no significant differences between sand and gravel extractions were observed (p=0.01).","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114095769","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}

{"title":"Effect of Aggregation on the Respiration Rate of the Freshwater Unionid Bivalve, Elliptio complanata (Solander)","authors":"C. G. Paterson","doi":"10.2307/1467088","DOIUrl":"https://doi.org/10.2307/1467088","url":null,"abstract":"The freshwater unionid bivalve, Elliptio complanata (Solander), has an aggregated distribution in Morice Lake, New Brunswick, Canada. Respiration rate, as measured in a 23 liter respirometer under varying degrees of aggregation, showed a significant decline as the number of bivalves was increased from 1 to 7 and then remained constant. Preliminary experiments suggest that a single individual uses oxygen at the same rate as each individual in a larger group when placed in water previously containing the larger group. It is hypothesized that the presence of other individuals in the vicinity in some way makes each individual more 'comfortable' and consequently lowers the extent to which water is transported to sense the environment which in turn reduces respiration rate.","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130323758","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}

{"title":"Back Matter","authors":"","doi":"10.1086/fresinvebiol.2.2.1467117","DOIUrl":"https://doi.org/10.1086/fresinvebiol.2.2.1467117","url":null,"abstract":"","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131423705","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}

{"title":"Post-Glacial Chironomid Succession in Two Small, Humic Lakes in the New Brunswick-Nova Scotia (Canada) Border Area","authors":"I. Walker, C. G. Paterson","doi":"10.2307/1467111","DOIUrl":"https://doi.org/10.2307/1467111","url":null,"abstract":"A comparative study of the post-glacial succession of chironomid communities in two closely located small lakes in the New Brunswick-Nova Scotia border area revealed initial similarities in their fauna, and a subsequent period of parallel evolution. Both lakes originally possessed a Tanytarsus-Heterotrissocladius community indicative of an oligotrophic lake environment. For much of the subsequent period, Tanytarsus remains dominant in both lakes. At about 4000 B.P., the development of the two lakes began to diverge. For Wood's Pond evidence suggests gradual encroachment by Sphagnum produced an acid, ombrotrophic environment. Subsequent to this encroachment, the Tanytarsus fauna typical of shallow, humic lakes was replaced by a peat-pool fauna with Chironomus and Monopectrocladius as dominants. The shift from Tanytarsus to Chironomus coincides with evidence for the beginning of settlement, suggesting human interference. Portey Pond did not become encircled by peat, and maintained a stable chironomid fauna throughout the post-glacial period and up to the present.","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126190959","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}

{"title":"Predicting the Colonization Cycle of Aquatic Invertebrates","authors":"R. Light, P. Adler","doi":"10.2307/1467112","DOIUrl":"https://doi.org/10.2307/1467112","url":null,"abstract":"The components of the colonization cycle for aquatic invertebrates (drift, upstream movement within the stream, and female flight direction) were quantified for a small Pennsylvania stream. Diel periodicities were evident for both aquatic and terrestrial drift. A regression predicted a linear relation between the proportion of benthos in the drift and the degree of upstream female flight. Accordingly, insects commonly occurring in the drift (Chironomidae, Baetis spp., Ephemerella invaria) showed significant upstream flight of females, whereas those rarely found in the drift (Glossosoma intermedium and G. nigrior, Psychodidae, Hydroptila spp. and Ochrotrichia wojcickyi, Sialis spp.) did not show significant upstream flight of females. Organisms without a winged adult stage (Gammarus minus, Turbellaria) showed a greater degree of upstream movement in the stream. Upstream movement in the stream compensated for only 2.6% of the total aquatic drift in July.","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130386011","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}

{"title":"A Stimulus for Egg Production in Glossiphonia complanata (L.) (Hirudinoidea:Glossiphoniidae)","authors":"J. Young","doi":"10.2307/1467116","DOIUrl":"https://doi.org/10.2307/1467116","url":null,"abstract":"Laboratory-reared G. complanata cultured in changing water temperatures, which simulated those experienced in the field, produced eggs under a 12L/12D photoperiod, natural light conditions and continual darkness. In two regimes which incorporated accelerated 'field-temperature' changes and a natural photoperiod, egg-laying occurred only in the least accelerated regime. Leeches failed to mature at constant temperatures within the range 10.5 to 23°C under two separate photoperiods, viz. 12L/12D and natural light conditions. It is concluded that changing temperature conditions, perhaps a period of low temperatures followed by rising and higher temperatures, is an essential stimulus for egg production and that photoperiod is not involved.","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"31 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114099930","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}

{"title":"The Immature Stages of Thienemannimyia barberi (Coquillett) (Diptera:Chironomidae:Tanypodinae)","authors":"S. Roback, L. Ferrington","doi":"10.2307/1467115","DOIUrl":"https://doi.org/10.2307/1467115","url":null,"abstract":"The larva and pupa of Thienemannimyia barberi (Coquillett) are described and compared with other known Thienemannimyia immatures and those of the closely related Conchapelopia (Meropelopia) species. Some ecological data are given and the group placement of T. barberi is discussed. The pupa described as Conchapelopia sp. in Roback (1981) belongs to this species.","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124272850","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}