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Female Social Dominance Does Not Establish Mating Priority in Nile Tilapia
Revista de Etologia 2004, Vol.6, N°1,Social 33-37 dominance and mating in the Nile tilapia Female Social Dominance does not Establish Mating Priority in Nile Tilapia ELIANE GONÇALVES-DE-FREITAS AND ALINE CHIMELLO FERREIRA Universidade Estadual Paulista, São José do Rio Preto Female dominance and size are important features for mating choices in fishes. As dominants are also the largest females in some species, we tested whether dominance per se favours mating priority in Nile tilapia females. Three matched-size adult females (n = 13) were grouped in a 140 l-aquarium during 3 days for hierarchical settlement. On the 4th day a male larger than the females was introduced in the group and kept there for 12 consecutive days until reproduction. Spawning occurred in 8 out of 13 replicates, and the alpha female was the first to mate in only 50% of the cases. Males may thus choose females according to size and not according to rank, as occurs in other cichlid species. As confrontations and the establishment of hierarchical dominance involve high energetic expenditure in Nile tilapias, the reason why females invest in such behaviors is still a question to be elucidated. Index terms: Reproductive behavior. Mate choice. Nile tilapias. Oreochromis niloticus. A dominância social da fêmea não promove prioridade de acasalamento em fêmeas de tilápia-do-Nilo. A dominância e o tamanho da fêmea são características importantes para a escolha do parceiro sexual em peixes. Como as fêmeas dominantes também são as maiores em várias espécies, procuramos verificar se a dominância em si promove a prioridade de acasalamento em fêmeas de tilápia-do-Nilo. -
§4-71-6.5 LIST of CONDITIONALLY APPROVED ANIMALS November
§4-71-6.5 LIST OF CONDITIONALLY APPROVED ANIMALS November 28, 2006 SCIENTIFIC NAME COMMON NAME INVERTEBRATES PHYLUM Annelida CLASS Oligochaeta ORDER Plesiopora FAMILY Tubificidae Tubifex (all species in genus) worm, tubifex PHYLUM Arthropoda CLASS Crustacea ORDER Anostraca FAMILY Artemiidae Artemia (all species in genus) shrimp, brine ORDER Cladocera FAMILY Daphnidae Daphnia (all species in genus) flea, water ORDER Decapoda FAMILY Atelecyclidae Erimacrus isenbeckii crab, horsehair FAMILY Cancridae Cancer antennarius crab, California rock Cancer anthonyi crab, yellowstone Cancer borealis crab, Jonah Cancer magister crab, dungeness Cancer productus crab, rock (red) FAMILY Geryonidae Geryon affinis crab, golden FAMILY Lithodidae Paralithodes camtschatica crab, Alaskan king FAMILY Majidae Chionocetes bairdi crab, snow Chionocetes opilio crab, snow 1 CONDITIONAL ANIMAL LIST §4-71-6.5 SCIENTIFIC NAME COMMON NAME Chionocetes tanneri crab, snow FAMILY Nephropidae Homarus (all species in genus) lobster, true FAMILY Palaemonidae Macrobrachium lar shrimp, freshwater Macrobrachium rosenbergi prawn, giant long-legged FAMILY Palinuridae Jasus (all species in genus) crayfish, saltwater; lobster Panulirus argus lobster, Atlantic spiny Panulirus longipes femoristriga crayfish, saltwater Panulirus pencillatus lobster, spiny FAMILY Portunidae Callinectes sapidus crab, blue Scylla serrata crab, Samoan; serrate, swimming FAMILY Raninidae Ranina ranina crab, spanner; red frog, Hawaiian CLASS Insecta ORDER Coleoptera FAMILY Tenebrionidae Tenebrio molitor mealworm, -
Maidenhead Aquatics Datasheet Lake
Maidenhead Aquatics Datasheet Lake Tanganyika Cichlids Lake Tanganyika is the deepest lake in Africa, and holds a very different assemblage of species to both Lake Malawi and Lake Victoria. There are many sub-groups of fish in this lake, all with different behaviour, environments and overall appearance. Tanganyikan cichlids also need hard, alkaline water with a pH around 8.0. They are usually must less aggressive and do not need to be overcrowded. However, they are not suitable for keeping in a community tank, and should not be mixed with the more boisterous Malawi's and Victorian's. Many species are small, so they can easily be kept in very small tanks, providing the water is kept free of pollution. SHELL DWELLERS Some species, such as many Neolamprologus species breed and take shelter in the shells of large aquatic snails. Many of these fish are fully grown at sizes of around 4cm (1%M), and can be kept alongside other larger species. For their size they are very aggressive and when breeding will often bite hands entering the tank for cleaning purposes. CAVE SPAWNERS Julidochromis, Variabilichromis, Altolamprologus and some Neolamprologus species spawn in crevices between rocks or in caves. Many of these form strong pair bonds, and have protracted parental care. Some species, for example, lay around 300 eggs. The young fry are guarded not only by both parents, but also by the previous generation of fry (older brothers and sisters). MOUTH BROODERS Some species, such as Tropheus and Xenotilapia are mouth brooders. Tropheus lay around 30 eggs which are kept in the female's mouth for around 30 days. -
Selection, Constraint, and Adaptation in the Visual Genes of Neotropical Cichlid Fishes and Other Vertebrates
SELECTION, CONSTRAINT, AND ADAPTATION IN THE VISUAL GENES OF NEOTROPICAL CICHLID FISHES AND OTHER VERTEBRATES by Frances Elisabeth Hauser A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy Ecology and Evolutionary Biology University of Toronto © Copyright by Frances E. Hauser 2018 SELECTION, CONSTRAINT, AND ADAPTATION IN THE VISUAL GENES OF NEOTROPICAL CICHLID FISHES AND OTHER VERTEBRATES Frances E. Hauser Doctor of Philosophy, 2018 Department of Ecology and Evolutionary Biology University of Toronto 2018 ABSTRACT The visual system serves as a direct interface between an organism and its environment. Studies of the molecular components of the visual transduction cascade, in particular visual pigments, offer an important window into the relationship between genetic variation and organismal fitness. In this thesis, I use molecular evolutionary models as well as protein modeling and experimental characterization to assess the role of variable evolutionary rates on visual protein function. In Chapter 2, I review recent work on the ecological and evolutionary forces giving rise to the impressive variety of adaptations found in visual pigments. In Chapter 3, I use interspecific vertebrate and mammalian datasets of two visual genes (RH1 or rhodopsin, and RPE65, a retinoid isomerase) to assess different methods for estimating evolutionary rate across proteins and the reliability of inferring evolutionary conservation at individual amino acid sites, with a particular emphasis on sites implicated in impaired protein function. ii In Chapters 4, and 5, I narrow my focus to devote particular attention to visual pigments in Neotropical cichlids, a highly diverse clade of fishes distributed across South and Central America. -
FOTAS Fish Tales 05.4
In this issue: 3 The Future of the Fed- eration of Texas Aquarium Societies Greg Steeves 8 FOTAS BAP 17 FOTAS HAP 24 FOTAS CARES Greg Steeves 25 Spawning the Buffalo- Volume 5 Issue 4 head Cichlid The FOTAS Fish Tales is a quarterly publication of the Federation of Texas Duc Nguyen Aquarium Societies a non-profit organization. The views and opinions contained within are not necessarily those of the editors and/or the officers 27 GloFish, Love them or and members of the Federation of Texas Aquarium Societies. Hate them, They are here to stay! FOTAS Fish Tales Editor: Gerald Griffin [email protected] Gerald Griffin Fish Tales Submission Guidelines 31 What the Heck is an ESU? Articles: Leslie Dick Please submit all articles in electronic form. We can accept most popular software formats and fonts. Email to [email protected]. Photos and 35 Spawning Julido- graphics are encouraged with your articles! Please remember to include the photo/graphic credits. Graphics and photo files may be submitted in chromis dickfieldi any format, however uncompressed TIFF, JPEG or vector format is pre- Gerald Griffin ferred, at the highest resolution/file size possible. If you need help with graphics files or your file is too large to email, please contact me for alterna- 37 Meet the San Antonio tive submission info. Aquatic Plant Club Art Submission: Chris Lewis Graphics and photo files may be submitted in any format. However, uncom- pressed TIFF, JPEG or vector formats are preferred. Please submit the 39 Participating in the FO- highest resolution possible. TAS BAP and HAP Next deadline…… Gerald Griffin January 15th 2016 On the Cover: COPYRIGHT NOTICE GloFish - Photos by York- All Rights Reserved. -
Eco-Ethology of Shell-Dwelling Cichlids in Lake Tanganyika
ECO-ETHOLOGY OF SHELL-DWELLING CICHLIDS IN LAKE TANGANYIKA THESIS Submitted in Fulfilment of the Requirements for the Degree of MASTER OF SCIENCE of Rhodes University by IAN ROGER BILLS February 1996 'The more we get to know about the two greatest of the African Rift Valley Lakes, Tanganyika and Malawi, the more interesting and exciting they become.' L.C. Beadle (1974). A male Lamprologus ocel/alus displaying at a heterospecific intruder. ACKNOWLEDGMENTS The field work for this study was conducted part time whilst gworking for Chris and Jeane Blignaut, Cape Kachese Fisheries, Zambia. I am indebted to them for allowing me time off from work, fuel, boats, diving staff and equipment and their friendship through out this period. This study could not have been occured without their support. I also thank all the members of Cape Kachese Fisheries who helped with field work, in particular: Lackson Kachali, Hanold Musonda, Evans Chingambo, Luka Musonda, Whichway Mazimba, Rogers Mazimba and Mathew Chama. Chris and Jeane Blignaut provided funds for travel to South Africa and partially supported my work in Grahamstown. The permit for fish collection was granted by the Director of Fisheries, Mr. H.D.Mudenda. Many discussions were held with Mr. Martin Pearce, then the Chief Fisheries Officer at Mpulungu, my thanks to them both. The staff of the JLB Smith Institute and DIFS (Rhodes University) are thanked for help in many fields: Ms. Daksha Naran helped with computing and organisation of many tables and graphs; Mrs. S.E. Radloff (Statistics Department, Rhodes University) and Dr. Horst Kaiser gave advice on statistics; Mrs Nikki Kohly, Mrs Elaine Heemstra and Mr. -
Summary Report of Freshwater Nonindigenous Aquatic Species in U.S
Summary Report of Freshwater Nonindigenous Aquatic Species in U.S. Fish and Wildlife Service Region 4—An Update April 2013 Prepared by: Pam L. Fuller, Amy J. Benson, and Matthew J. Cannister U.S. Geological Survey Southeast Ecological Science Center Gainesville, Florida Prepared for: U.S. Fish and Wildlife Service Southeast Region Atlanta, Georgia Cover Photos: Silver Carp, Hypophthalmichthys molitrix – Auburn University Giant Applesnail, Pomacea maculata – David Knott Straightedge Crayfish, Procambarus hayi – U.S. Forest Service i Table of Contents Table of Contents ...................................................................................................................................... ii List of Figures ............................................................................................................................................ v List of Tables ............................................................................................................................................ vi INTRODUCTION ............................................................................................................................................. 1 Overview of Region 4 Introductions Since 2000 ....................................................................................... 1 Format of Species Accounts ...................................................................................................................... 2 Explanation of Maps ................................................................................................................................ -
Genome Sequences of Tropheus Moorii and Petrochromis Trewavasae, Two Eco‑Morphologically Divergent Cichlid Fshes Endemic to Lake Tanganyika C
www.nature.com/scientificreports OPEN Genome sequences of Tropheus moorii and Petrochromis trewavasae, two eco‑morphologically divergent cichlid fshes endemic to Lake Tanganyika C. Fischer1,2, S. Koblmüller1, C. Börger1, G. Michelitsch3, S. Trajanoski3, C. Schlötterer4, C. Guelly3, G. G. Thallinger2,5* & C. Sturmbauer1,5* With more than 1000 species, East African cichlid fshes represent the fastest and most species‑rich vertebrate radiation known, providing an ideal model to tackle molecular mechanisms underlying recurrent adaptive diversifcation. We add high‑quality genome reconstructions for two phylogenetic key species of a lineage that diverged about ~ 3–9 million years ago (mya), representing the earliest split of the so‑called modern haplochromines that seeded additional radiations such as those in Lake Malawi and Victoria. Along with the annotated genomes we analysed discriminating genomic features of the study species, each representing an extreme trophic morphology, one being an algae browser and the other an algae grazer. The genomes of Tropheus moorii (TM) and Petrochromis trewavasae (PT) comprise 911 and 918 Mbp with 40,300 and 39,600 predicted genes, respectively. Our DNA sequence data are based on 5 and 6 individuals of TM and PT, and the transcriptomic sequences of one individual per species and sex, respectively. Concerning variation, on average we observed 1 variant per 220 bp (interspecifc), and 1 variant per 2540 bp (PT vs PT)/1561 bp (TM vs TM) (intraspecifc). GO enrichment analysis of gene regions afected by variants revealed several candidates which may infuence phenotype modifcations related to facial and jaw morphology, such as genes belonging to the Hedgehog pathway (SHH, SMO, WNT9A) and the BMP and GLI families. -
Classifications and Other Ordering Systems
J. Zool. Syst. Evol. Research 40 (2002) 169–194 Received on 5 August 2002 Ó 2002 Blackwell Verlag, Berlin ISSN 0947–5745 1Museum of Comparative Zoology, Harvard University, Cambridge, MA, USA; 2Department of Biological Sciences, Columbian University, NewYork, NY, USA Classifications and other ordering systems Ernst Mayr1 and W. J. Bock2 Abstract 9.5.1. Evidently descended from the same ancestor 1. Introduction 9.5.2. Parallelophyly 2. Why ordering systems should be of interest to the 9.5.3. Reversal philosopher? 9.5.4. Convergence 3. The universality of diversity 9.6. Significance of characters (weighing) 4. Objectives of ordering systems 9.7. Numerical approaches 4.1. Sorting 10. Ordering by using only the criterion of phylogeny – type 5 4.2. Information storage and retrieval is a major objective 10.1. Hennigian cladification of most ordering systems 10.2. Peculiarities of Hennigian terminology 4.3. Identification of an unknown item 10.2.1. Paraphyly 4.4. Inferences about not yet studied properties 10.2.2. Monophyly 4.5. To serve as base line in comparative studies 10.2.3. Relationship 5. Kinds of Ordering Systems 10.2.4. Classification 5.1 General considerations 10.2.5. Taxon 5.2. Ordering of single entities 10.3. Cladistic analysis 5.2.1. Assigning singular entities to a linear sequence 10.4. Recognition of clades (sequential listing) –type 1 11. Upward classification by two criteria, clustering by 5.2.1.1. Arbitrary sequence similarity and by common descent – type 6 5.2.1.2. Alphabetical listing 11.1. Pre-Darwinian classification 5.2.1.3. -
They're Not Just Convicts Anymore
2008 FAAS Publication Awards. Please follow reprint instructions at http://www.faas.info/2008_publication_awards_winners.html#reprintpolicy They’re Not Just Convicts Anymore By Daniel Spielman All Photos by Daniel Spielman Introduction Convicts get no respect, with many a cichlidophile turning up his or her nose at the sight of a group on Convicts in a tank or a bag of fry in an auction. It’s time for that to change. Easy to breed and exhibiting wonderful parental care, Convict cichlids (Cryptoheros nigrofasciatus) have long been staples in the hobby. Indeed, for many new fishkeepers, the satisfaction of watching a pair of Convict parents herd a group of fry around a tank sparks the initial desire to keep other mem bers of the cichlid family. Indeed, my fish cichlids were Convicts, and watch ing them care for their fry definitely got me hooked. The contrast with trying to keep guppies or swordtails from eating their own offspring is striking (how did eating one’s own young ever evolve in the first place?). However, the very fact that Convicts spawn so readily in the aquarium causes many hobbyists to quickly lose interest in the species. Although Convicts occasionally appear on experienced hobbyists’ lists of most favorite cichlid, the problem is they are just too common and too easy to breed. Typical Convict spawning jokes involve two fish and a wet paper towel, and one often feels fortunate to break the $1 barrier at the auction to avoid the indignity of having to bring one’s fish back home again at the end of the monthly club meeting. -
Tank Topics the Official Publication of the Greater Akron Aquarium Society
Tank Topics The Official Publication of The Greater Akron Aquarium Society Oct./Nov. 2009 In this issue: Phallichthys amates amates Xixphophorous alvarezi Board Member Job Descriptions THE GREATER AKRON AQUARIUM SOCIETY WHO ARE WE? We are a local group of aquatic enthusiasts. Formed in 1952, the Greater Akron Aquarium Society is a non-profit, non-commercial organization. Our membership ranges from the beginning hobbyist to the advanced aquarist with many years of experience. The goals of our club are to promote the care, study, breeding and exhibition of aquarium related aquatic life and to promote interest in the aquarium hobby. MEETINGS: Our meetings are held on the first Thursday of each month at 8:00 p.m. at the Mogadore Community/Senior Center, 3857 Mogadore Road, Mogadore, Ohio. It is located East of Route 532 across from McDonald’s in the former post office building (see map on inside back cover) Visitors are always welcome, it costs absolutely nothing to attend a meeting and look us over. MEMBERSHIP: The cost is only $750 for adults, $10 for a couple or a family (includes children under 10 years of age) and $5.00 for a junior membership (10 to 17 years) Membership provides an opportunity to socialize with other that share your interests, a subscription to our bi-monthly magazine, library usage and more. AGENDA: Our meeting agenda is simple and informal. The meeting will begin at 8:00 p.m. with a short business meeting. Immediately following is the program for the evening which usually lasts about 45 minutes. Our programs consist of a speaker, slide program, movie or perhaps a panel discussion always on a particular subject related to the hobby or various species of fish. -
Paternity of Subordinates Raises Cooperative Effort in Cichlids
Paternity of Subordinates Raises Cooperative Effort in Cichlids Rick Bruintjes1,2*, Danielle Bonfils1, Dik Heg1,3, Michael Taborsky1 1 Department of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Hinterkappelen, Switzerland, 2 School of Biological Sciences, University of Bristol, Bristol, United Kingdom, 3 Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland Abstract Background: In cooperative breeders, subordinates generally help a dominant breeding pair to raise offspring. Parentage studies have shown that in several species subordinates can participate in reproduction. This suggests an important role of direct fitness benefits for cooperation, particularly where groups contain unrelated subordinates. In this situation parentage should influence levels of cooperation. Here we combine parentage analyses and detailed behavioural observations in the field to study whether in the highly social cichlid Neolamprologus pulcher subordinates participate in reproduction and if so, whether and how this affects their cooperative care, controlling for the effect of kinship. Methodology/Principal Findings: We show that: (i) male subordinates gained paternity in 27.8% of all clutches and (ii) if they participated in reproduction, they sired on average 11.8% of young. Subordinate males sharing in reproduction showed more defence against experimentally presented egg predators compared to subordinates not participating in reproduction, and they tended to stay closer to the breeding shelter. No effects of relatedness between subordinates and dominants (to mid-parent, dominant female or dominant male) were detected on parentage and on helping behaviour. Conclusions/Significance: This is the first evidence in a cooperatively breeding fish species that the helping effort of male subordinates may depend on obtained paternity, which stresses the need to consider direct fitness benefits in evolutionary studies of helping behaviour.