Flounders Are Flat Fish Which Live on the Sand at the Bottom of the Ocean, Usually in Inlets and Estuaries
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Pleuronectidae, Poecilopsettidae, Achiridae, Cynoglossidae
1536 Glyptocephalus cynoglossus (Linnaeus, 1758) Pleuronectidae Witch flounder Range: Both sides of North Atlantic Ocean; in the western North Atlantic from Strait of Belle Isle to Cape Hatteras Habitat: Moderately deep water (mostly 45–330 m), deepest in southern part of range; found on mud, muddy sand or clay substrates Spawning: May–Oct in Gulf of Maine; Apr–Oct on Georges Bank; Feb–Jul Meristic Characters in Middle Atlantic Bight Myomeres: 58–60 Vertebrae: 11–12+45–47=56–59 Eggs: – Pelagic, spherical Early eggs similar in size Dorsal fin rays: 97–117 – Diameter: 1.2–1.6 mm to those of Gadus morhua Anal fin rays: 86–102 – Chorion: smooth and Melanogrammus aeglefinus Pectoral fin rays: 9–13 – Yolk: homogeneous Pelvic fin rays: 6/6 – Oil globules: none Caudal fin rays: 20–24 (total) – Perivitelline space: narrow Larvae: – Hatching occurs at 4–6 mm; eyes unpigmented – Body long, thin and transparent; preanus length (<33% TL) shorter than in Hippoglossoides or Hippoglossus – Head length increases from 13% SL at 6 mm to 22% SL at 42 mm – Body depth increases from 9% SL at 6 mm to 30% SL at 42 mm – Preopercle spines: 3–4 occur on posterior edge, 5–6 on lateral ridge at about 16 mm, increase to 17–19 spines – Flexion occurs at 14–20 mm; transformation occurs at 22–35 mm (sometimes delayed to larger sizes) – Sequence of fin ray formation: C, D, A – P2 – P1 – Pigment intensifies with development: 6 bands on body and fins, 3 major, 3 minor (see table below) Glyptocephalus cynoglossus Hippoglossoides platessoides Total myomeres 58–60 44–47 Preanus length <33%TL >35%TL Postanal pigment bars 3 major, 3 minor 3 with light scattering between Finfold pigment Bars extend onto finfold None Flexion size 14–20 mm 9–19 mm Ventral pigment Scattering anterior to anus Line from anus to isthmus Early Juvenile: Occurs in nursery habitats on continental slope E. -
Food Choice of Different Size Classes of Flounder (Platichthys Flesus ) In
Food choice of different size classes of flounder ( Platichthys flesus ) in the Baltic Sea Jennie Ljungberg Degree project in biology, Master of science (2 years), 2014 Examensarbete i biologi 30 hp till masterexamen, 2014 Biology Education Centre Supervisor: Bertil Widbom Table of Contents ABSTRACT ............................................................................................................................................ 3 INTRODUCTION ................................................................................................................................... 4 Flounders in the Baltic Sea .................................................................................................................. 5 The diet of flounders ........................................................................................................................... 6 Blue mussel (Mytilus edulis) ............................................................................................................... 7 Blue mussels in the Baltic Sea............................................................................................................. 8 The nutritive value of blue mussels ..................................................................................................... 9 The condition of flounders in the Baltic Sea ....................................................................................... 9 Aims ................................................................................................................................................. -
Winter Flounder
Maine 2015 Wildlife Action Plan Revision Report Date: January 13, 2016 Pseudopleuronectes americanus (Winter Flounder) Priority 2 Species of Greatest Conservation Need (SGCN) Class: Actinopterygii (Ray-finned Fishes) Order: Pleuronectiformes (Flatfish) Family: Pleuronectidae (Righteye Flounders) General comments: Maine DMR jurisdiction; W Atlantic specialist = LB-GA No Species Conservation Range Maps Available for Winter Flounder SGCN Priority Ranking - Designation Criteria: Risk of Extirpation: NA State Special Concern or NMFS Species of Concern: NA Recent Significant Declines: Winter Flounder is currently undergoing steep population declines, which has already led to, or if unchecked is likely to lead to, local extinction and/or range contraction. Notes: ASMFC Stock Assess, 30yr, and DFO. 2012. Assessment of winter flounder (Pseudopleuronectes americanus) in the southern Gulf of St. Lawrence (NAFO Div. 4T). DFO Can. Sci. Advis. Sec. Sci. Advis. Rep. 2012/016. Regional Endemic: NA High Regional Conservation Priority: Atlantic States Marine Fisheries Commission Stock Assessments: Status: Unstable/Decreasing, Status Comment: Reference: High Climate Change Vulnerability: NA Understudied rare taxa: NA Historical: NA Culturally Significant: NA Habitats Assigned to Winter Flounder: Formation Name Subtidal Macrogroup Name Subtidal Coarse Gravel Bottom Habitat System Name: Coarse Gravel **Primary Habitat** Notes: adult spawning Habitat System Name: Kelp Bed Notes: juvenile Macrogroup Name Subtidal Mud Bottom Habitat System Name: Submerged Aquatic -
Chapter 5: Commercial and Recreational Fisheries
Ocean Special Area Management Plan Chapter 5: Commercial and Recreational Fisheries Table of Contents 500 Introduction.............................................................................................................................9 510 Marine Fisheries Resources in the Ocean SAMP Area.....................................................12 510.1 Species Included in this Chapter ..........................................................................12 510.1.1 Species important to commercial and recreational fisheries.....................12 510.1.2 Forage fish ................................................................................................15 510.1.3 Threatened and endangered species and species of concern ....................15 510.2 Life History, Habitat, and Fishery of Commercially and Recreationally Important Species............................................................................................................17 510.2.1 American lobster.......................................................................................17 510.2.2 Atlantic bonito ..........................................................................................19 510.2.3 Atlantic cod...............................................................................................20 510.2.4 Atlantic herring .........................................................................................21 510.2.5 Atlantic mackerel......................................................................................23 510.2.6 Atlantic -
Pictorial Guide to the Gill Arches of Gadids and Pleuronectids in The
Alaska Fisheries Science Center National Marine Fisheries Service U.S. DEPARTMENT OF COMMERCE AFSC PROCESSED REPORT 91.15 Pictorial Guide to the G¡ll Arches of Gadids and Pleuronectids in the Eastern Bering Sea May 1991 This report does not const¡Ute a publicalion and is for lnformation only. All data herein are to be considered provisional. ERRATA NOTICE This document is being made available in .PDF format for the convenience of users; however, the accuracy and correctness of the document can only be certified as was presented in the original hard copy format. Inaccuracies in the OCR scanning process may influence text searches of the .PDF file. Light or faded ink in the original document may also affect the quality of the scanned document. Pictorial Guide to the ciII Arches of Gadids and Pleuronectids in the Eastern Beri-ng Sea Mei-Sun Yang Alaska Fisheries Science Center National Marine Fisheries Se:nrice, NoAÀ 7600 Sand Point Way NE, BIN C15700 Seattle, lÍA 98115-0070 May 1991 11I ABSTRÀCT The strrrctures of the gill arches of three gadids and ten pleuronectids were studied. The purPose of this study is, by using the picture of the gill arches and the pattern of the gi[- rakers, to help the identification of the gadids and pleuronectids found Ín the stomachs of marine fishes in the eastern Bering Sea. INTRODUCTION One purjose of the Fish Food Habits Prograrn of the Resource Ecology and FisherY Managenent Division (REF![) is to estimate predation removals of cornmercially inportant prey species by predatory fish (Livingston et al. 1986). -
Identification of the Sole Resources of the Gambia
Identification of the Sole Resources of The Gambia Gambia-Senegal Sustainable Fisheries Program (Ba Nafaa) December 2011 This publication is available electronically on the Coastal Resources Center’s website at http://www.crc.uri.edu. For more information contact: Coastal Resources Center, University of Rhode Island, Narragansett Bay Campus, South Ferry Road, Narragansett, Rhode Island 02882, USA. Tel: 401) 874-6224; Fax: 401) 789-4670; Email: [email protected] The BaNafaa project is implemented by the Coastal Resources Center of the University of Rhode Island and the World Wide Fund for Nature-West Africa Marine Ecoregion (WWF-WAMER) in partnership with the Department of Fisheries and the Ministry of Fisheries, Water Resources and National Assembly Matters. Citation: Coastal Resources Center, 2011. Identification of the Sole Resources of The Gambia. Coastal Resources Center, University of Rhode Island, pp.11 Disclaimer: This report was made possible by the generous support of the American people through the United States Agency for International Development (USAID). The contents are the responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government. Cooperative Agreement # 624-A-00-09- 00033-00. Cover Photo: Coastal Resources Center/URI Fisheries Center Photo Credit: Coastal Resources Center/URI Fisheries Center 2 The Sole Resources Proper identification of the species is critical for resource management. There are four major families of flatfish with representative species found in the Gambian nearshore waters: Soleidae, Cynoglossidae, Psettododae and Paralichthyidae. The species below have been confirmed through literature review, and through discussions with local fishermen, processors and the Gambian Department of Fisheries. -
Differences in Juvenile Plaice and Flounder Otolith Microchemistry from the Inner Danish Waters Elliot J
Differences in juvenile plaice and flounder otolith microchemistry from the Inner Danish Waters Elliot J. Brown Patrick Reis-Santos Bronwyn M. Gillanders Josianne G. Støttrup Introduction – the wider project Describing juvenile habitat quality for recreationally important fish species of the Inner Danish Waters. 1. [Presence/Absence, Density, Growth] ~ [Physical Factors] + [Biological Factors] VS [Presence/Absence, Density, Growth] ~ [Physical Factors] 2. [Presence/Absence, Density, Growth] ~ [Physical Factors] 3. Apply models to identify potential juvenile habitats European Flounder European Plaice Platichthys flesus Pleuronectes platessa 2 DTU Aqua, Technical University of Denmark Juvenile plaice and flounder otolith 12-11-2017 microchemistry from the IDW Introduction – this specific project 4. Can otolith microchemistry be used to correctly assign individuals back to juvenile growth regions across contiguous areas? Vasconcelos et al, 2007 Bailey et al, 2015 Beck et al, 2001 3 DTU Aqua, Technical University of Denmark Juvenile plaice and flounder otolith 12-11-2017 microchemistry from the IDW Introduction – this specific project Question 1. • Is there a difference in the levels of different elemental components of sagittal otoliths between hybridising(?) con-familials (flounder and plaice) where they are living together? Question 2. • Is it possible to differentiate between contiguous coastal juvenile habitat areas for plaice using otolith microchemistry? 4 DTU Aqua, Technical University of Denmark Juvenile plaice and flounder otolith 12-11-2017 microchemistry from the IDW n = 113 Field Collections n = 37 n = 36 5 DTU Aqua, Technical University of Denmark Juvenile plaice and flounder otolith 12-11-2017 microchemistry from the IDW Field Collections • Fish killed benzocaine at 250g/mL in aerated seawater. -
Pilot Production of Hatchery-Reared Summer Flounder Paralichthys Dentatus in a Marine Recirculating Aquaculture System: the Effe
JOURNAL OF THE Volume 36, No. 1 WORLD AQUACULTURE SOCIETY March 2005 Pilot Production of Hatchery-RearedSummer Flounder Purulichthys dentutus in a Marine Recirculating Aquaculture System: The Effects of Ration Level on Growth, Feed Conversion, and Survival PATRICKM. CARROLLAND WADE0. WATANABE University of North Carolina at Wilmington, Centerfor Marine Science, 7205 WrightsvilleAvenue, Wilmington, North Carolina 28403 USA THOMASM. LOSORDO Department of Zoology, North Carolina State University, Raleigh, North Carolina 27695 USA Abstract-Pilot-scale trials were conducted to suggests increased competition for a restricted ration evaluate growout performance of hatchery-reared led to a slower growth with more growth variation. The summer flounder fingerlings in a state-of-the-art decrease in growth in phases 2 and 3 was probably related recirculating aquaculture system (RAS). The outdoor to a high percentage of slower growing male fish in the RAS consisted of four 4.57-m dia x 0.69-111 deep (vol. population and the onset of sexual maturity. = 11.3 m’) covered, insulated tanks and associated water This study demonstrated that under commercial treatment components. Fingerlings (85.1 g mean initial scale conditions, summer flounder can be successfully weight) supplied by a commercial hatchery were stocked grown to a marketable size in a recirculating aquaculture into two tanks at a density of 1,014 fishhank (7.63 kg/mg). system. Based on these results, it is recommended that a Fish were fed an extruded dry floating diet consisting farmer feed at a satiation rate to minimize growout time. of 50% protein and 12% lipid. The temperature was More research is needed to maintain high growth rates maintained between 20 C and 23 C and the salinity was through marketable sizes through all-female production 34 ppt. -
Differences in Diet of Atlantic Bluefin Tuna
16 8 Abstract–The stomachs of 819 Atlan Differences in diet of Atlantic bluefin tuna tic bluefin tuna (Thunnus thynnus) sampled from 1988 to 1992 were ana (Thunnus thynnus) at five seasonal feeding grounds lyzed to compare dietary differences among five feeding grounds on the on the New England continental shelf* New England continental shelf (Jef freys Ledge, Stellwagen Bank, Cape Bradford C. Chase Cod Bay, Great South Channel, and South of Martha’s Vineyard) where a Massachusetts Division of Marine Fisheries majority of the U.S. Atlantic commer 30 Emerson Avenue cial catch occurs. Spatial variation in Gloucester, Massachusetts 01930 prey was expected to be a primary E-mail address: [email protected] influence on bluefin tuna distribution during seasonal feeding migrations. Sand lance (Ammodytes spp.), Atlantic herring (Clupea harengus), Atlantic mackerel (Scomber scombrus), squid (Cephalopoda), and bluefish (Pomato Atlantic bluefin tuna (Thunnus thyn- England continental shelf region, and mus saltatrix) were the top prey in terms of frequency of occurrence and nus) are widely distributed throughout as a baseline for bioenergetic analyses. percent prey weight for all areas com the Atlantic Ocean and have attracted Information on the feeding habits of bined. Prey composition was uncorre valuable commercial and recreational this economically valuable species and lated between study areas, with the fisheries in the western North Atlantic apex predator in the western North exception of a significant association during the latter half of the twentieth Atlantic Ocean is limited, and nearly between Stellwagen Bank and Great century. The western North Atlantic absent for the seasonal feeding grounds South Channel, where sand lance and population is considered overfished by where most U.S. -
Flounder Fluke / Summer Flounder Paralichthys Dentatus
Flounder Fluke / Summer Flounder Paralichthys dentatus Description: NUTRITIONAL U Flounder or “Fluke” is a flatfish. Flatfish are found all over the INFORMATION 3.5 oz raw portion world and there are around 540 species. True Flounders are found in Northern waters and our Flounder is caught on the Northern East Calories 91 coast of the United States. All flatfish have both eyes on one side of Fat Calories 10.8 the head. They all begin life as round fish and one eye migrates as it Total Fat 1.2 g becomes a bottom-dwelling fish. All commercially important soles Saturated Fat .3 g and Flounders are right-eyed except Fluke which is left-eyed. The Sodium 81 mg Protein 18.8 g market size for Flounder is about 1 to 5 lb and all flatfish yield 4 Cholesterol 48 mg fillets unlike round fish that yield 2. Omega-3 .2 g Eating Qualities: Cooking Methods Raw Flounder ranges from tan, to pinkish, to snow-white, but the cooked meat of all species is pure white with a small fake and mild flavor. The sweet taste and firm texture of the Yellowtail Flounder is Bake a favorite as well as lemon and gray sole. Broil Fry Fishing Methods and Regulations: Poach Flounder are caught by hook and line, trawl and trap-net. The Saute highest quality resulting from the trap-net fishery. The fishery is Sashimi heavily regulated in America and each state has its own regulation on when and how the fish can be caught. Handling Whole fish should be packed in flaked Sold as: ice. -
Pleuronectidae 3863
click for previous page Pleuronectiformes: Pleuronectidae 3863 PLEURONECTIDAE Righteye flounders by D.A. Hensley iagnostic characters: Body oval-shaped or elongate, strongly compressed (size to about 22 cm). DMargin of preopercle distinct, not covered by skin and scales. Eyes on right side of head; reversals rare. Mouth and teeth small. Gill rakers elongate, not tooth-like. Dorsal-fin origin anterior to posterior margin of upper eye; no fin spines; urinary papilla on eyed side; caudal fin not attached to dorsal and anal fins; pectoral fin on blind side smaller than fin on eyed side or missing; pelvic-fin bases short or somewhat elongate, fin on eyed side slightly anterior to that of blind side and closer to or on midventral line. Scales small; lateral line weakly developed or missing on blind side of body. Colour: body on eyed side variable in colour pattern, often with spots or blotches on body and fins; blind side whitish. elongate anterior dorsal-fin rays (in the commercially used Samaris cristatus and another species of the genus, but absent in all other species in the area) dorsal and anal fins not joined to caudal fin origin of dorsal fin eyes on right side of head Samaris cristatus margin of preopercle distinct Habitat, biology, and fisheries: Most Indo-Pacific species are found at depths of about 60 to 500 m on soft bottoms composed of mixtures of mud, sand, silt, and crushed shells. Some shallow-water species occur as shallow as 6 m in or on sands around coral reefs. One species (Samaris cristatus) occurs in fairly shallow water and is marketed. -
Sand Flounder (Family Paralichthyidae) Diversity in North Carolina by the Ncfishes.Com Team
Sand Flounder (Family Paralichthyidae) Diversity in North Carolina By the NCFishes.com Team Along North Carolina’s shore there are four families of flatfish comprising 36 species having eyes on the left side of their body facing upward when lying in or atop the substrate (NCFishes.com; Table 1; Figure 1). The families and species can be confusing to tell apart. The key characteristics provided for in Table 1 should enable one to differentiate between the four families and this document will aid you in the identification of the species in the Family Paralichthyidae in North Carolina. Table 1. The four families of left-facing flounders found along and off the coast of North Carolina. Family Common Name Key Characteristics (adapted from Munroe 2002) No. Species Preopercle exposed, its posterior margin free and visible, not hidden by skin or scales. Dorsal fin long, originating above, lateral to, or anterior to upper eye. Dorsal and anal fins not attached to caudal fin. Both pectoral Paralichthyidae Sand Flounders fins present. Both pelvic fins present, with 5 or 6 rays. 20 Margin of preopercle not free (hidden beneath skin and scales). Pectoral fins absent in adults. Lateral line absent on both sides of body. Cynoglossidae Tonguefishes Dorsal and anal fins joined to caudal fin. No branched caudal-fin rays. 9 Lateral line absent or poorly developed on blind side; lateral line absent below lower eye. Lateral line of eyed side with high arch over pectoral Bothidae Lefteye Flounders fin. Pelvic fin of eyed side on midventral line. 6 Both pelvic fins elongate, placed close to midline and extending forward to urohyal.