The Biological bulletin最新文献_第8页

Relationship of Reproductive Output in Acartia tonsa, Chlorophyll Concentration, and Land-Derived Nitrogen Loads in Estuaries of Waquoit Bay, Massachusetts. 马塞诸塞州瓦奎特湾河口柽柽树繁殖产量、叶绿素浓度和陆源氮负荷的关系

IF 1.6

The Biological bulletin Pub Date : 1999-10-01 DOI: 10.2307/1542660

A Cubbage, D Lawrence, G Tomasky, I Valiela

引用次数: 8

Morphology of the Nervous System of the Barnacle Cypris Larva (Balanus amphitrite Darwin) Revealed by Light and Electron Microscopy. 用光学和电子显微镜观察塞浦路斯藤壶幼体神经系统的形态。

IF 1.6

The Biological bulletin Pub Date : 1999-10-01 DOI: 10.2307/1542611

P J H Harrison, D C Sandeman

引用次数: 60

Ipswich River Nutrient Dynamics: Preliminary Assessment of a Simple Nitrogen-Processing Model. 伊普斯维奇河营养动态:一个简单氮处理模型的初步评估。

IF 1.6

The Biological bulletin Pub Date : 1999-10-01 DOI: 10.2307/1542657

K M Pease, L Claessens, C Hopkinson, E Rastetter, J Vallino, N Kilham

引用次数: 0

Urinary Protein Concentration in Connection with Agonistic Interactions in Homarus americanus. 美洲小家鼠尿蛋白浓度与激动相互作用的关系。

IF 1.6

The Biological bulletin Pub Date : 1999-10-01 DOI: 10.2307/1542635

L C McLaughlin, J Walters, J Atema, N Wainwright

引用次数: 5

Effects of Increased Nitrogen Loading on the Abundance of Diatoms and Dinoflagellates in Estuarine Phytoplanktonic Communities. 增加氮负荷对河口浮游植物群落中硅藻和鞭毛藻丰度的影响

IF 1.6

The Biological bulletin Pub Date : 1999-10-01 DOI: 10.2307/1542659

A Evgenidou, A Konkle, A D'Ambrosio, A Corcoran, J Bowen, E Brown, D Corcoran, C Dearholt, S Fern, A Lamb, J Michalowski, I Ruegg, J Cebrián

引用次数: 4

Waterborne and Surface-Associated Carbohydrates as Settlement Cues for Larvae of the Specialist Marine Herbivore Alderia modesta. 水生和表面相关碳水化合物作为专业海洋食草动物赤藻幼虫的定居线索。

IF 1.6

The Biological bulletin Pub Date : 1999-08-01 DOI: 10.2307/1543000

P J Krug, A E Manzi

{"title":"Waterborne and Surface-Associated Carbohydrates as Settlement Cues for Larvae of the Specialist Marine Herbivore Alderia modesta.","authors":"P J Krug, A E Manzi","doi":"10.2307/1543000","DOIUrl":"https://doi.org/10.2307/1543000","url":null,"abstract":"Larvae of the specialist marine herbivore Alderia modesta (Opisthobranchia: Ascoglossa) metamorphose in response to a chemical settlement cue from the alga Vaucheria longicaulis, the obligate adult prey. Bioactivity coeluted with both high and low molecular weight carbohydrates in solution, and with insoluble high molecular weight carbohydrates associated with the algal cell wall. Larvae metamorphosed in response to water conditioned by V. longicaulis, as well as to frozen and homogenized algal tissue. The inducer was efficiently extracted from the algae with boiling water, but after all soluble activity was extracted, residual tissue still induced larval settlement. Ethanol precipitation of a boiled-water extract followed by gel filtration chromatography showed that the precipitate contained carbohydrates of >100,000 Da molecular weight, while the supernatant contained only low molecular weight carbohydrates (<2,000 Da); in both cases all activity was associated with the carbohydrate peak. An aqueous-insoluble 4% NaOH extract was chromatographed in 7 M urea to yield a bioactive high molecular weight carbohydrate peak. Activity was not affected by proteinase K or mild acid hydrolysis, but was significantly decreased by periodate treatment. The results indicate that larvae of A. modesta metamorphose in response to both water-soluble and surface-associated carbohydrates of V. longicaulis, and that the soluble cue exists as both high and low molecular weight isoforms.","PeriodicalId":153307,"journal":{"name":"The Biological bulletin","volume":" ","pages":"94-103"},"PeriodicalIF":1.6,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/1543000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34814649","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: 75

Annual Viral Expression in a Sea Slug Population: Life Cycle Control and Symbiotic Chloroplast Maintenance. 海蛞蝓种群的年病毒表达:生命周期控制和共生叶绿体维持。

IF 1.6

The Biological bulletin Pub Date : 1999-08-01 DOI: 10.2307/1542990

S K Pierce, T K Maugel, M E Rumpho, J J Hanten, W L Mondy

{"title":"Annual Viral Expression in a Sea Slug Population: Life Cycle Control and Symbiotic Chloroplast Maintenance.","authors":"S K Pierce, T K Maugel, M E Rumpho, J J Hanten, W L Mondy","doi":"10.2307/1542990","DOIUrl":"https://doi.org/10.2307/1542990","url":null,"abstract":"In a few well-known cases, animal population dynamics are regulated by cyclical infections of protists, bacteria, or viruses. In most of these cases, the pathogen persists in the environment, where it continues to infect some percentage of successive generations of the host organism. This persistent re-infection causes a long-lived decline, in either population size or cycle, to a level that depends upon pathogen density and infection level (1-4). We have discovered, on the basis of 9 years of observation, an annual viral expression in Elysia chlorotica, an ascoglossan sea slug, that coincides with the yearly, synchronized death of all the adults in the population. This coincidence of viral expression and mass death is ubiquitous, and it occurs in the laboratory as well as in the field. Our evidence also suggests that the viruses do not re-infect subsequent generations from an external pathogen pool, but are endogenous to the slug. We are led, finally, to the hypothesis that the viruses may be involved in the maintenance of symbiotic chloroplasts within the molluscan cells.","PeriodicalId":153307,"journal":{"name":"The Biological bulletin","volume":" ","pages":"1-6"},"PeriodicalIF":1.6,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/1542990","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34814567","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: 44

The Velar Ciliature in the Brooded Larva of the Chilean Oyster Ostrea chilensis (Philippi, 1845). 智利牡蛎Ostrea chilensis幼虫的鳞状纤毛(Philippi, 1845)。

IF 1.6

The Biological bulletin Pub Date : 1999-08-01 DOI: 10.2307/1543001

O R Chaparro, R J Thompson, C J Emerson

{"title":"The Velar Ciliature in the Brooded Larva of the Chilean Oyster Ostrea chilensis (Philippi, 1845).","authors":"O R Chaparro, R J Thompson, C J Emerson","doi":"10.2307/1543001","DOIUrl":"https://doi.org/10.2307/1543001","url":null,"abstract":"The Chilean oyster (Ostrea chilensis) broods its offspring almost to the settlement stage (about 8 weeks). Larvae are maintained inside the infrabranchial chamber of the female. Samples from all embryo and larval developmental stages were obtained from mantle cavities of brooding females and analyzed by scanning electron microscopy, with particular attention to the velar structures. All embryos and the earliest veliger stages of O. chilensis are devoid of cilia. Cilia first appear when shell length reaches 290-300 {mu}m, and the first cilia to grow on the velum form the outer preoral cilia. In larvae 340 {mu}m long, all the ciliary rings on the velum can be distinguished. These are the apical cilia (AC), inner preoral cilia (IPC), outer preoral cilia (OPC), and adoral cilia (AOC). The absence of the apical tuft in both O. chilensis and the closely related species O. edulis represents an adaptation to brooding by the embryos and larvae, but the lack of the postoral cilia (POC) in O. chilensis and the lack of cilia in the embryonic and early veliger stages are associated with an extreme brooding condition in this species.","PeriodicalId":153307,"journal":{"name":"The Biological bulletin","volume":" ","pages":"104-111"},"PeriodicalIF":1.6,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/1543001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34814568","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: 23

Mechanical Resistance to Shear Stress: The Role of Echinoderm Egg Extracellular Layers. 对剪切应力的机械抵抗:棘皮动物卵细胞外层的作用。

IF 1.6

The Biological bulletin Pub Date : 1999-08-01 DOI: 10.2307/1542991

F I M Thomas, K A Edwards, T F Bolton, M A Sewell, J M Zande

引用次数: 26

Concurrent Signals and Behavioral Plasticity in Blue Crab (Callinectes sapidus Rathbun) Courtship. 蓝蟹求偶过程中的同步信号和行为可塑性。

IF 1.6

The Biological bulletin Pub Date : 1999-08-01 DOI: 10.2307/1542997

P J Bushmann

{"title":"Concurrent Signals and Behavioral Plasticity in Blue Crab (Callinectes sapidus Rathbun) Courtship.","authors":"P J Bushmann","doi":"10.2307/1542997","DOIUrl":"https://doi.org/10.2307/1542997","url":null,"abstract":"Behavioral flexibility and behavioral regulation through courtship signals may both contribute to mating success. Blue crabs (Callinectes sapidus) form precopulatory pairs after courtship periods that are influenced by female and perhaps male urine-based chemical signals. In this study, male and female crabs were observed in 1.5-m circular outdoor pools for 45 min while the occurrence and sequence of courtship behaviors and pairing outcomes were recorded. These results were then compared with trials in which males or females were blindfolded; lateral antennule (outer flagellum) ablated; blindfolded and lateral antennule ablated; or had received nephropore blocks. The relative importance of visual and chemical sensory systems during blue crab courtship were then determined and urine and non-urine based chemical signals for both males and females were examined. Courtship behaviors varied considerably in occurrence and sequence; no measured behavior was necessary for pairing success. Male or female blindfolding had no effect on any measured behavior. Males and females required chemical information for normal courtship behaviors, yet blocking male or female urine release did not affect courtship behaviors. Males required chemical information to initiate pairing or to maintain stable pairs. Male urine release was necessary for stable pairing, suggesting that male urine signals may be involved in pair maintenance rather than pair formation. Females that could not receive chemical information paired faster and elicited fewer male agonistic behaviors. The results demonstrate a great variability and flexibility in blue crab courtship, with no evidence for stereotyped behavioral sequences. However, these behaviors appear regulated by urine- and nonurine-based redundant chemical signals emanating from both males and females. Although urine-based signals play roles in blue crab courtship, chemical signals from other sites appear to carry sufficient information to elicit a full range of behavioral responses in males and females.","PeriodicalId":153307,"journal":{"name":"The Biological bulletin","volume":" ","pages":"63-71"},"PeriodicalIF":1.6,"publicationDate":"1999-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/1542997","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34814646","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: 48