Bivalve-3

Name: Freshwater Clams, Bivalve
S. Name: Batissa Violacea (Lamarck 1818)

Local name: Bibi, Cabibi
Presentor:
CABALES, BOBBY H.
NECESITO, MARK S.
CALISA, CHARLES L.
Clams are bivalve mollusks belonging to
the class Bivalvia. Here are some basic
facts about clams.
1. Anatomy: Clams have a soft body protected by
a two part hinged shell. The shells are made of
calcium carbonate and can vary in shape, size,
and color depending on the species. The shells
are connected by a hinged and held together by
strong adductor muscles.
Source: Lewis R., (2023). Animals and Nature. The editors of
Encyclopedia Britannica
2. Habitat
 Clams are found in a wide range of aquatic
environments, including marine and freshwater
habitats. They inhabit various location such as
sandy or muddy bottoms, estuaries, intertidal
zones, and deep ocean floors.
 Freshwater clam B. Violacea are only abundant
on areas where substrate is made up of a
mixture of fine sand, fine gravel and firm
bluish black mud (Ledua et al. 1996) because
one of their biological activities is to burrow to
a permeable depth in rivers beds to endure
drought periods (Carpenter and Niem, 1998).
Habitat
3. Feeding
Clams are filter feeders. They use
their gills to extract plankton,
organic particles, and other small
food particles from the
surrounding water. They draw
water into their shells and filter
out the food while expelling
excess water and waste.
Feeding
4. Reproduction
Most clams are dioecious, with
separate male and female
individuals, although some
species are hermaphroditic.
Clams release eggs and sperm
into the water, where fertilization
occurs externally. The fertilized
eggs develop into larvae, which
eventually settle and grow into
adult clams.
Reproduction
5. Economic Importance
Clams have significant economic
value as a food source. They are
consumed worldwide and are
used in various culinary dishes,
such as clam chowder, clam
pasta and clam bakes. Clams are
also commercially harvested for
their meat and can support
important fisheries in certain
regions.
Economic Importance
Bebe Kropik
Brgy. Canuctan, Catubig N.

Samar
6. Environmental Role
Clams play an important
ecological role. They help
maintain water quality by filtering
and removing excess nutrients
and organic matter. They also
serve as a food source for other
organisms contribute to the
overall biodiversity of aquatic
ecosystems.
Environmental Role
What does it indicate? What
environmental conditions does it
tell?
Here are some ways in which bivalves can
indicate environmental conditions;
1. Water quality
2. Pollution
3. Salinity
4. Sediments quality
5. temperature
How can it be used as
indicator?
Bivalves have traditionally been
considered good bio indicators due to their
sensitivity to pollution, among other
features and it is also used as a bio-
indicator for monitoring the health of
aquatic ecosystems because they are
extremely sensitive to a wide range of
environmental factors including the levels
of dissolved oxygen in water.
Thus, changes in the abundance and
biomass of this species can directly and
indirectly influence the ecosystem
functioning and the livelihood of local
people. It is well recognized that
lengthweight relationship is an important
tool that explains the changes of shell
proportions in bivalves found in natural
water bodies or from culturing in various
environmental conditions; water depth,
currents, turbulence, wave exposure, types
of bottom and sediments.
What is in its biology that makes
it an indicator of a particular
environmental quality.
Bivalves species play important roles in
environmental aspect in both aquatic
and marine ecosystems by filtering the
water and serving as habitat and prey
for a variety of sea life.
They are considered as good indicators
due to the capacity to accumulate the
trace metals in proportion to the
concentration in the surrounding
environment. most of the bivalve
species are used as indicators for
examining status of the environment
Thank you!

Bivalve-3

Uploaded by

Copyright:

Available Formats

Bivalve-3

Uploaded by

Document Information

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

Bivalve-3

Uploaded by

Copyright:

Available Formats

Name: Freshwater Clams, Bivalve

S. Name: Batissa Violacea (Lamarck 1818)

Brgy. Canuctan, Catubig N.

You might also like